七年级 有理数计算题
有理数加法
(-9)+(-13) (-12)+27 (-28)+(-34) 67+(-92) (-27.8)+43.9
(-23)+7+(-152)+65 |+(-)| (-)+|―|
38+(-22)+(+62)+(-78) (-8)+(-10)+2+(-1) (-)+0+(+)+(-)+(-)
(-8)+47+18+(-27) (-5)+21+(-95)+29 (-8.25)+8.25+(-0.25)+(-5.75)+(-7.5)
6+(-7)+(9)+2 72+65+(-105)+(-28) (-23)+|-63|+|-37|+(-77)
19+(-195)+47 (+18)+(-32)+(-16)+(+26) (-0.8)+(-1.2)+(-0.6)+(-2.4)
(-8)+(-3)+2+(-)+12 5+(-5)+4+(-) (-6.37)+(-3)+6.37+2.75
有理数减法
7-9 ―7―9 0-(-9) (-25)-(-13) 8.2―(―6.3)
(-3)-5 (-12.5)-(-7.5) (-26)―(-12)―12―18 ―1―(-)―(+)
(-20)-(+5)-(-5)-(-12) (-23)―(-59)―(-3.5) |-32|―(-12)―72―(-5)
(-)―(-)― (+)―(-)―(-)― (-)―3―(-3.2)―7
(+)―(-)― (+6.1)―(-4.3)―(-2.1)―5.1 (-)―(-1)―(-1)―(+1.75)
(-3)―(-2)―(-1)―(-1.75) -8-5+4-3 -4++(-)―
0.5+(-)-(-2.75)+ (+4.3)-(-4)+(-2.3)-(+4) (-0.5)-(-3)+6.75-5
有理数乘法
(-9)× (-)×(-0.26) (-2)×31×(-0.5)
×(-5)+×(-13) (-4)×(-10)×0.5×(-3) (-)××(-1.8)
(-0.25)×(-)×4×(-7) (-)×(-)×(-) (-8)×4×(-)×(-0.75)
4×(-96)×(-0.25)× (-1+)×56 (――)×36
(-36)×(+-) (-)×(8--0.4) (-66)×〔1-(-)+(-)〕
25×-(-25)×+25× (+-+)×72 ×(2-)×(-)×(-)
有理数除法
18÷(-3) (-24)÷6 (-57)÷(-3) (-)÷ (-42)÷(-6)
(+)÷(-) (-)÷9 0.25÷(-) -36÷(-1)÷(-) (-1)÷(-4)÷
3÷(-)×(-) 0÷[(-3)×(-7)] -3÷(-) (-24)÷(-6)
2÷(5-18)× 1÷(-3)×(-) -×(-)÷(-) (-)÷(-)
(-+)÷(-) -3.5 ×(-0.5)×÷ -1÷(-1)×1×(-7)
×(--)÷ ÷(-2)-×-÷4 0.8×+4.8×(-)-2.2÷+0.8×
五、有理数混合运算
(-)×(-15×4) (-2.4) 2÷(-)×÷(-5)
[15-(1÷1+3]÷(-1) ×(-5)÷(-)×5 -(-+-)÷(-)
-13×-0.34×+×(-13)-×0.34 8-(-25)÷(-5) (-13)×(-134)××(-)
(-4)-(-5)+(-4)-3 (-16-50+3)÷(-2) (-0.5)-(-3)+6.75-5
178-87.21+43+53-12.79 (-6)×(-4)+(-32)÷(-8)-3 --(-)+|-1|
(-9)×(-4)+ (-60)÷12 [(-)-1+]÷(-) -|-3|÷10-(-15)×
-1×(-)÷2 (2-3+1)÷(-1)×(-7) -×(8-2-0.04)
-2× -- - -2× ÷
× + ×× ×-
++ -×- -+
0-÷3× ×÷ -×-÷
×(-+1) ×0 6+× -10+8÷-4×3
-- -(1-0.5)× ××
4×+6 ××× -+2×+(-6)÷
÷(-8)-×(-) ×()×
-2[-3×]÷ ÷9÷ 36×
-{} -+(1-0.5)××[2×]
-4×+ --+×÷ 负数如果大于正数得出结果是负数比如:5+(-9)=-4 是相当于5-9=-4
两个负数相加等于负数比如:-5+(-9)=-14
60道有理数加法题:
1、5+(-9)=-4
2、(-11)+99=88
3、1+(-5)=-4
4、16+(-12)=4
5、12+(-74)=-62
6、1+(-1)=0
7、(-5)+4=-1
8、(-2)+89=87
9、(-1)+0=-1
10、(-5)+8=3
11、(-56)+88=32
12、(-23)+66=43
13、(-3)+2=-1
14、(-9)+1=-8
15、(-6)+68=62
16、(-57)+67=10 39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
4. [-18]+29+[-52]+60=
5. [-3]+[-2]+[-1]+0+1+2=
6. [-301]+125+301+[-75]=
7. 25+(-18)+(-17)+(-22)=
8. -1+2-3+4-5+6-7=
9. -50-28+(-24)-(-22)=
10. -19.8-(-20.3)-(+20.2)-10.8=
11. 0.25- +(-1 )-(+3 )=
12. (-6)+8+(-4)+12=
13. 12+35+(-23)+0=
14. 23+(-17)+6+(-22)=
15. (-2)+3+1+(-3)+2+(-4)=
-38)+52+118+(-62)(-32)+68+(-29)+(-68)
(-21)+251+21+(-151)
12+35+(-23)+0
(-6)+8+(-4)+12 27+(-26)+33+(-27)
12+35+(-23)+0
39+[-23]+0+[-16]
[-18]+29+[-52]+60
[-3]+[-2]+[-1]+0+1+2
[-301]+125+301+[-75]
[-1]+[-1/2]+[+3/4]+[-1/4]
[-7/2]+[+5/6]+[-0.5]+4/5+19/6
[-26.54]+[-6.14]+18.54+6.14
1.125+[-17/5]+[-1/8]+[-0.6]
1-4/9
1-7/10
8/15-5
7-15
2/8-5/8
8/27-5
4-27
11/12-10/12
16/21-1/7
4/ 2-(3+3 )
1/3- 7/12-7/18
1 -1/3-1 1/5
10-7/10
5/24+3/8
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]
[-18]+29+[-52]+60
[-3]+[-2]+[-1]+0+1+2
[-301]+125+301+[-75]
[-1]+[-1/2]+[+3/4]+[-1/4]
[-7/2]+[+5/6]+[-0.5]+4/5+19/6
[-26.54]+[-6.14]+18.54+6.14
1.125+[-17/5]+[-1/8]+[-0.6]
0.75+[-11/4]+0.125+12又5/7+[-3/8]
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4] -38)+52+118+(-62)=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
75÷〔138÷(100-54)〕 85×(95-1440÷24)
80400-(4300+870÷15) 240×78÷(154-115)
1437×27+27×563 〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕 280+840÷24×5
325÷13×(266-250) 85×(95-1440÷24)
58870÷(105+20×2) 1437×27+27×563
81432÷(13×52+78) [37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3] (947-599)+76×64
36×(913-276÷23) [192-(54+38)]×67
[(7.1-5.6)×0.9-1.15]÷2.5 81432÷(13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62] (947-599)+76×64 60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4 1.25×2.4) 0.8×〔15.5-(3.21 5.79)〕 (31.8 3.2×4)÷5 194-64.8÷1.8×0.9 36.72÷4.25×9.9 3.416÷(0.016×35) 0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (58+37)÷(64-9×5)
812-700÷(9+31×11) (3.2×1.5+2.5)÷1.6
85+14×(14+208÷26) 120-36×4÷18+35
(284+16)×(512-8208÷18) 9.72×1.6-18.305÷7
4/7÷[1/3×(3/5-3/10)] (4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 ) 37.812-700÷(9+31×11) (136+64)×(65-345÷23) 3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×(3.87-0.13)+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
回答者: 754791551 - 魔法学徒 一级 10-5 13:26
(一)计算题:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
(9)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(15)(-2/199)*(-7/6-3/2+8/3)
(16)4a)*(-3b)*(5c)*1/6
还有50道题,不过没有答案
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10 有理数的运算练习题
(一)填空
4.23-17-(+23)=______.
5.-7-9+(-13)=______.
6.-11+|12-(39-8)|=______.
7.-9-|5-(9-45)|=______.
8.-5.6+4.7-|-3.8-3.8|=______.
9.-|-0.2|+[0.6-(0.8-5.4)]=______.
12.9.53-8-(2-|-11.64+1.53-1.36|)=______.
13.73.17-(812.03-|219.83+518|)=______.
25.已知2.342=5.476,那么-0.13×(-234)2=______.
26.若有理数m<n<0,则m3•n2的符号为______.
28.935的末位数字是______.
32.(37-34)5÷64×(-82)=______.
34.365×[72-23×7+(-24)]=______.
36.38×(-7)+5[(-2)3(-32)-(-22)]-38×339÷(-3)38=______.
______.
48.(-2)×{(-3)×[(-5)+2×(0.3-0.3)÷83-3]+4}=______.
50.用四舍五入法取近似值,396.7精确到十位的近似数是______;保留两个有效数字的近似数是______.
51.用四舍五入法取近似值,0.01249精确到0.001的近似数是______;保留三个有效数字的近似数是______.
52.今有17.5吨煤,若一辆汽车最多运4吨,则需至少派______辆汽车可一次将煤运走.
53.若8.662=75,则8662=______.
54.若2.07143=8.888,则0.20714=______.
(二)选择
55.不能使式|-11.3+______|=|-11.3|+|______|成立的数是 [ ]
A.任意一个数;
B.任意一个正数;
C.任一个负数;
D.任一个非负数.
56.不能使式|-0.19-______|=|-0.19|+|______|成立的数是 [ ]
A.任一个负数;
B.任一个非负数;
C.任一个正数;
D.任一个非正数.
57.不能使式|-7.31+______|=|-7.31|+|______|成立的数是 [ ]
A.任一个负数;
B.任一个非负数;
C.任一个正数;
D.任一个非正数.
[ ]
A.任意一个数;
C.任意一个负数;
D.任意一个非负数.
59.11.3-22.7+7.3等于 [ ]
A.-4.1;
B.-18.7;
C.-4.4;
D.-18.4.
[ ]
A.-11.7;
B.-10.1;
C.-8.1;
D.-10.3.
[ ]
A.2.2;
B.-3.2;
C.-2.2;
D.3.2.
62.-{66-[-6+(4-84-24)]}等于 [ ]
A.-168;
B.-176;
C.-116;
D.-124.
[ ]
[ ]
A.1;
B.-1;
C.0;
D.3.
65.-793.8-[3.8-(178.2-0.2)]等于 [ ]
A.-620.4;
B.-615;
C.-619.6;
D.-611.6.
[ ]
[ ]
[ ]
A.1;
D.0.1
69.-0.32÷0.5×2÷(-2)2的值是 [ ]
[ ]
71.(-0.3)3÷(-0.1)2×(-0.012)÷(-34)的值是 [ ]
72.若a•b<|a•b|,则下列结论正确的是 [ ]
A.a<0,b<0;
B.a>0,b<0;
C.a<0,b>0;
D.a•b<0.
73.下列不等式中正确的是 [ ]
A.-22×32>-22×3>-2×32>(-2×3)2;
B.(-2×3)2>-22×3>-2×32>-22×32;
C.-2×32>-22×3>-22×32>(-2×3)2;
D.-22×3>-22×32>(-2×3)2>-2×32.
74.(2002-1002)÷104的结果是 [ ]
A.1;
B.2;
C.3;
D.以上都不对.
75.下列数中与(-7-2)5相等的数是 [ ]
A.(-7)5+(-2)5;
B.-145;
C.310;
D.-310.
76.下列各数中与2×64×(-29)相等的数是 [ ]
A.216;
B.-216;
C.-254;
D.-384.
77.下列各数中比0小的偶数是 [ ]
A.(-5-2)3;
B.(-3)3(-2)3;
C.(-1+32)3;
D.(-3)4(-2)3.
小的数是 [ ]
A.这个数;
B.这个数的相反数;
C.这个数的倒数;
D.这个数的绝对值.
79.下列各式中正确的式子是 [ ]
80.下列各式中正确的式子是 [ ]
A.(-3-2)3=33×23;
B.144÷12×12=1;
C.(32)4-(34)2=0;
D.(-3)3(-2)3=-63.
81.下列各式中错误的式子是 [ ]
A.(33)2=36;
B.28-27=27;
D.2×32×37+33×36=310.
82.下列各数中最大的数是 [ ]
A.3×32-2×22;
B.(3×3)2-(2×2)2;
C.(33)2-(22)2;
D.(33)2-(22)2.
83.下列各数中最小的数是 [ ]
A.(-3-2)3;
B.(-3)(-2)3;
C.(-3)3÷(-2)3;
D.(-3)3(-2)3.
[ ]
85.如果(-ab)125>0,则下列正确的是 [ ]
C.a>0,b<0;
D.a<0,b>0.
86.如果等式a=a2成立,则a可能的取值是 [ ]
A.1个;
B.2个;
C.3个;
D.以上结论都不对.
87.a为任意整数,则下列四组数中的数字都不可能是a2的末位数字的应是 [ ]
A.3,4,9,0;
B.2,3,7,8;
C.4,5,6,7;
D.1,5,6,9.
88.四个各不相等的整数a,b,c,d,它们的积a•b•c•d=9,那么a+b+c+d的值是 [ ]
A.0;
B.4;
C.8;
D.不能确定.
[ ]
A.2;
B.4;
[ ]
A.大于零;
B.小于零;
C.等于零;
D.以上三种情况都有可能.
91.已知n是自然数,(-7)n+8=-335,则n的值是 [ ]
A.-3;
B.3;
C.2;
D.-2.
92.已知(a-1)2+3=7,则a的值是 [ ]
A.-1;
B.3;
C.-1或3;
D.以上均不对.
[ ]
[ ]
A.0.25;
B.2.5;
C.2500;
D.25000.
[ ]
A.-0.00125;
B.0.00125;
C.-0.00005;
D.0.0005.
[ ]
A.16;
B.-16;
C.1;
D.-1.
97.3.6÷(-0.62)÷0.62×(-6)3的值是 [ ]
A.6000;
B.-6000;
C.-600;
D.600.
98.对于|-a|b2+ab2,下列说法正确的是 [ ]
A.|-a|b2+ab2恒为正数;
B.|-a|b2+ab2恒为负数;
C.|-a|b2+ab2恒为零;
D.|-a|b2+ab2恒为非负数.
99.已知a=2,b=3,则(ab-ba)(ba+ab)的值是 [ ]
A.17;
B.-17;
C.13;
D.-13.
100.|3+(-2)3×(-3)2+(-23)(-32)|与25的差是 [ ]
A.大于零;
B.小于零;
C.等于零;
D.以上都有可能.
七年级 有理数计算题
有理数加法
(-9)+(-13) (-12)+27 (-28)+(-34) 67+(-92) (-27.8)+43.9
(-23)+7+(-152)+65 |+(-)| (-)+|―|
38+(-22)+(+62)+(-78) (-8)+(-10)+2+(-1) (-)+0+(+)+(-)+(-)
(-8)+47+18+(-27) (-5)+21+(-95)+29 (-8.25)+8.25+(-0.25)+(-5.75)+(-7.5)
6+(-7)+(9)+2 72+65+(-105)+(-28) (-23)+|-63|+|-37|+(-77)
19+(-195)+47 (+18)+(-32)+(-16)+(+26) (-0.8)+(-1.2)+(-0.6)+(-2.4)
(-8)+(-3)+2+(-)+12 5+(-5)+4+(-) (-6.37)+(-3)+6.37+2.75
有理数减法
7-9 ―7―9 0-(-9) (-25)-(-13) 8.2―(―6.3)
(-3)-5 (-12.5)-(-7.5) (-26)―(-12)―12―18 ―1―(-)―(+)
(-20)-(+5)-(-5)-(-12) (-23)―(-59)―(-3.5) |-32|―(-12)―72―(-5)
(-)―(-)― (+)―(-)―(-)― (-)―3―(-3.2)―7
(+)―(-)― (+6.1)―(-4.3)―(-2.1)―5.1 (-)―(-1)―(-1)―(+1.75)
(-3)―(-2)―(-1)―(-1.75) -8-5+4-3 -4++(-)―
0.5+(-)-(-2.75)+ (+4.3)-(-4)+(-2.3)-(+4) (-0.5)-(-3)+6.75-5
有理数乘法
(-9)× (-)×(-0.26) (-2)×31×(-0.5)
×(-5)+×(-13) (-4)×(-10)×0.5×(-3) (-)××(-1.8)
(-0.25)×(-)×4×(-7) (-)×(-)×(-) (-8)×4×(-)×(-0.75)
4×(-96)×(-0.25)× (-1+)×56 (――)×36
(-36)×(+-) (-)×(8--0.4) (-66)×〔1-(-)+(-)〕
25×-(-25)×+25× (+-+)×72 ×(2-)×(-)×(-)
有理数除法
18÷(-3) (-24)÷6 (-57)÷(-3) (-)÷ (-42)÷(-6)
(+)÷(-) (-)÷9 0.25÷(-) -36÷(-1)÷(-) (-1)÷(-4)÷
3÷(-)×(-) 0÷[(-3)×(-7)] -3÷(-) (-24)÷(-6)
2÷(5-18)× 1÷(-3)×(-) -×(-)÷(-) (-)÷(-)
(-+)÷(-) -3.5 ×(-0.5)×÷ -1÷(-1)×1×(-7)
×(--)÷ ÷(-2)-×-÷4 0.8×+4.8×(-)-2.2÷+0.8×
五、有理数混合运算
(-)×(-15×4) (-2.4) 2÷(-)×÷(-5)
[15-(1÷1+3]÷(-1) ×(-5)÷(-)×5 -(-+-)÷(-)
-13×-0.34×+×(-13)-×0.34 8-(-25)÷(-5) (-13)×(-134)××(-)
(-4)-(-5)+(-4)-3 (-16-50+3)÷(-2) (-0.5)-(-3)+6.75-5
178-87.21+43+53-12.79 (-6)×(-4)+(-32)÷(-8)-3 --(-)+|-1|
(-9)×(-4)+ (-60)÷12 [(-)-1+]÷(-) -|-3|÷10-(-15)×
-1×(-)÷2 (2-3+1)÷(-1)×(-7) -×(8-2-0.04)
-2× -- - -2× ÷
× + ×× ×-
++ -×- -+
0-÷3× ×÷ -×-÷
×(-+1) ×0 6+× -10+8÷-4×3
-- -(1-0.5)× ××
4×+6 ××× -+2×+(-6)÷
÷(-8)-×(-) ×()×
-2[-3×]÷ ÷9÷ 36×
-{} -+(1-0.5)××[2×]
-4×+ --+×÷ 负数如果大于正数得出结果是负数比如:5+(-9)=-4 是相当于5-9=-4
两个负数相加等于负数比如:-5+(-9)=-14
60道有理数加法题:
1、5+(-9)=-4
2、(-11)+99=88
3、1+(-5)=-4
4、16+(-12)=4
5、12+(-74)=-62
6、1+(-1)=0
7、(-5)+4=-1
8、(-2)+89=87
9、(-1)+0=-1
10、(-5)+8=3
11、(-56)+88=32
12、(-23)+66=43
13、(-3)+2=-1
14、(-9)+1=-8
15、(-6)+68=62
16、(-57)+67=10 39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
4. [-18]+29+[-52]+60=
5. [-3]+[-2]+[-1]+0+1+2=
6. [-301]+125+301+[-75]=
7. 25+(-18)+(-17)+(-22)=
8. -1+2-3+4-5+6-7=
9. -50-28+(-24)-(-22)=
10. -19.8-(-20.3)-(+20.2)-10.8=
11. 0.25- +(-1 )-(+3 )=
12. (-6)+8+(-4)+12=
13. 12+35+(-23)+0=
14. 23+(-17)+6+(-22)=
15. (-2)+3+1+(-3)+2+(-4)=
-38)+52+118+(-62)(-32)+68+(-29)+(-68)
(-21)+251+21+(-151)
12+35+(-23)+0
(-6)+8+(-4)+12 27+(-26)+33+(-27)
12+35+(-23)+0
39+[-23]+0+[-16]
[-18]+29+[-52]+60
[-3]+[-2]+[-1]+0+1+2
[-301]+125+301+[-75]
[-1]+[-1/2]+[+3/4]+[-1/4]
[-7/2]+[+5/6]+[-0.5]+4/5+19/6
[-26.54]+[-6.14]+18.54+6.14
1.125+[-17/5]+[-1/8]+[-0.6]
1-4/9
1-7/10
8/15-5
7-15
2/8-5/8
8/27-5
4-27
11/12-10/12
16/21-1/7
4/ 2-(3+3 )
1/3- 7/12-7/18
1 -1/3-1 1/5
10-7/10
5/24+3/8
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]
[-18]+29+[-52]+60
[-3]+[-2]+[-1]+0+1+2
[-301]+125+301+[-75]
[-1]+[-1/2]+[+3/4]+[-1/4]
[-7/2]+[+5/6]+[-0.5]+4/5+19/6
[-26.54]+[-6.14]+18.54+6.14
1.125+[-17/5]+[-1/8]+[-0.6]
0.75+[-11/4]+0.125+12又5/7+[-3/8]
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4] -38)+52+118+(-62)=
(-32)+68+(-29)+(-68)=
(-21)+251+21+(-151)=
12+35+(-23)+0=
(-6)+8+(-4)+12 =
27+(-26)+33+(-27)
12+35+(-23)+0=
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
1-4/9 =
1-7/10=
8/15-5=
7-15=
2/8-5/8=
8/27-5 =
4-27 =
11/12-10/12=
16/21-1/7 =
4/ 2-(3+3 )=
1/3- 7/12-7/18=
1 -1/3-1 1/5 =
10-7/10=
5/24+3/8 =
4.5-3/5
1-3/5=2/5
4.39*1/13*2/3
1+(-2)+(-3)+4+5+(-6)+(-7)+8+9+(-10)+(-11)+12
-15.8+13又6分之5+15又5分之4
(-7分之1)+(-7分之2)+1又7分之3
-0.5-(-3 )+2.75-(+7 )
39+[-23]+0+[-16]=
[-18]+29+[-52]+60=
[-3]+[-2]+[-1]+0+1+2=
[-301]+125+301+[-75]=
[-1]+[-1/2]+[+3/4]+[-1/4]=
[-7/2]+[+5/6]+[-0.5]+4/5+19/6=
[-26.54]+[-6.14]+18.54+6.14=
1.125+[-17/5]+[-1/8]+[-0.6]=
0.75+[-11/4]+0.125+12又5/7+[-3/8]=
[-4/9]+[-3/5]+[+11/8]+[+5/9]+[-1/8]+[-0.4]=
75÷〔138÷(100-54)〕 85×(95-1440÷24)
80400-(4300+870÷15) 240×78÷(154-115)
1437×27+27×563 〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕 280+840÷24×5
325÷13×(266-250) 85×(95-1440÷24)
58870÷(105+20×2) 1437×27+27×563
81432÷(13×52+78) [37.85-(7.85+6.4)] ×30
156×[(17.7-7.2)÷3] (947-599)+76×64
36×(913-276÷23) [192-(54+38)]×67
[(7.1-5.6)×0.9-1.15]÷2.5 81432÷(13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62] (947-599)+76×64 60-(9.5+28.9)]÷0.18 2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15] 28-(3.4 1.25×2.4) 0.8×〔15.5-(3.21 5.79)〕 (31.8 3.2×4)÷5 194-64.8÷1.8×0.9 36.72÷4.25×9.9 3.416÷(0.016×35) 0.8×[(10-6.76)÷1.2]
(136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (58+37)÷(64-9×5)
812-700÷(9+31×11) (3.2×1.5+2.5)÷1.6
85+14×(14+208÷26) 120-36×4÷18+35
(284+16)×(512-8208÷18) 9.72×1.6-18.305÷7
4/7÷[1/3×(3/5-3/10)] (4/5+1/4)÷7/3+7/10
12.78-0÷( 13.4+156.6 ) 37.812-700÷(9+31×11) (136+64)×(65-345÷23) 3.2×(1.5+2.5)÷1.6
85+14×(14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+16)×(512-8208÷18)
0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6
120-36×4÷18+35 10.15-10.75×0.4-5.7
5.8×(3.87-0.13)+4.2×3.74 347+45×2-4160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6
3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6
5.8×(3.87-0.13)+4.2×3.74
33.02-(148.4-90.85)÷2.5
回答者: 754791551 - 魔法学徒 一级 10-5 13:26
(一)计算题:
(1)23+(-73)
(2)(-84)+(-49)
(3)7+(-2.04)
(4)4.23+(-7.57)
(5)(-7/3)+(-7/6)
(6)9/4+(-3/2)
(7)3.75+(2.25)+5/4
(8)-3.75+(+5/4)+(-1.5)
(9)(-17/4)+(-10/3)+(+13/3)+(11/3)
(10)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11)(+1.3)-(+17/7)
(12)(-2)-(+2/3)
(13)|(-7.2)-(-6.3)+(1.1)|
(14)|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)
(15)(-2/199)*(-7/6-3/2+8/3)
(16)4a)*(-3b)*(5c)*1/6
还有50道题,不过没有答案
1. 3/7 × 49/9 - 4/3
2. 8/9 × 15/36 + 1/27
3. 12× 5/6 – 2/9 ×3
4. 8× 5/4 + 1/4
5. 6÷ 3/8 – 3/8 ÷6
6. 4/7 × 5/9 + 3/7 × 5/9
7. 5/2 -( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 × 5/6 + 5/6
10. 3/4 × 8/9 - 1/3
0.12χ+1.8×0.9=7.2 (9-5χ)×0.3=1.02 6.4χ-χ=28+4.4
11. 7 × 5/49 + 3/14
12. 6 ×( 1/2 + 2/3 )
13. 8 × 4/5 + 8 × 11/5
14. 31 × 5/6 – 5/6
15. 9/7 - ( 2/7 – 10/21 )
16. 5/9 × 18 – 14 × 2/7
17. 4/5 × 25/16 + 2/3 × 3/4
18. 14 × 8/7 – 5/6 × 12/15
19. 17/32 – 3/4 × 9/24
20. 3 × 2/9 + 1/3
21. 5/7 × 3/25 + 3/7
22. 3/14 ×× 2/3 + 1/6
23. 1/5 × 2/3 + 5/6
24. 9/22 + 1/11 ÷ 1/2
25. 5/3 × 11/5 + 4/3
26. 45 × 2/3 + 1/3 × 15
27. 7/19 + 12/19 × 5/6
28. 1/4 + 3/4 ÷ 2/3
29. 8/7 × 21/16 + 1/2
30. 101 × 1/5 – 1/5 × 21
31.50+160÷40 (58+370)÷(64-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(64-9×5)
35.95÷(64-45)
36.178-145÷5×6+42 420+580-64×21÷28
37.812-700÷(9+31×11) (136+64)×(65-345÷23)
38.85+14×(14+208÷26)
39.(284+16)×(512-8208÷18)
40.120-36×4÷18+35
41.(58+37)÷(64-9×5)
42.(6.8-6.8×0.55)÷8.5
43.0.12× 4.8÷0.12×4.8
44.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
48.10.15-10.75×0.4-5.7
49.5.8×(3.87-0.13)+4.2×3.74
50.32.52-(6+9.728÷3.2)×2.5
51.-5+58+13+90+78-(-56)+50
52.-7*2-57/(3
53.(-7)*2/(1/3)+79/(3+6/4)
54.123+456+789+98/(-4)
55.369/33-(-54-31/15.5)
56.39+{3x[42/2x(3x8)]}
57.9x8x7/5x(4+6)
58.11x22/(4+12/2)
59.94+(-60)/10 有理数的运算练习题
(一)填空
4.23-17-(+23)=______.
5.-7-9+(-13)=______.
6.-11+|12-(39-8)|=______.
7.-9-|5-(9-45)|=______.
8.-5.6+4.7-|-3.8-3.8|=______.
9.-|-0.2|+[0.6-(0.8-5.4)]=______.
12.9.53-8-(2-|-11.64+1.53-1.36|)=______.
13.73.17-(812.03-|219.83+518|)=______.
25.已知2.342=5.476,那么-0.13×(-234)2=______.
26.若有理数m<n<0,则m3•n2的符号为______.
28.935的末位数字是______.
32.(37-34)5÷64×(-82)=______.
34.365×[72-23×7+(-24)]=______.
36.38×(-7)+5[(-2)3(-32)-(-22)]-38×339÷(-3)38=______.
______.
48.(-2)×{(-3)×[(-5)+2×(0.3-0.3)÷83-3]+4}=______.
50.用四舍五入法取近似值,396.7精确到十位的近似数是______;保留两个有效数字的近似数是______.
51.用四舍五入法取近似值,0.01249精确到0.001的近似数是______;保留三个有效数字的近似数是______.
52.今有17.5吨煤,若一辆汽车最多运4吨,则需至少派______辆汽车可一次将煤运走.
53.若8.662=75,则8662=______.
54.若2.07143=8.888,则0.20714=______.
(二)选择
55.不能使式|-11.3+______|=|-11.3|+|______|成立的数是 [ ]
A.任意一个数;
B.任意一个正数;
C.任一个负数;
D.任一个非负数.
56.不能使式|-0.19-______|=|-0.19|+|______|成立的数是 [ ]
A.任一个负数;
B.任一个非负数;
C.任一个正数;
D.任一个非正数.
57.不能使式|-7.31+______|=|-7.31|+|______|成立的数是 [ ]
A.任一个负数;
B.任一个非负数;
C.任一个正数;
D.任一个非正数.
[ ]
A.任意一个数;
C.任意一个负数;
D.任意一个非负数.
59.11.3-22.7+7.3等于 [ ]
A.-4.1;
B.-18.7;
C.-4.4;
D.-18.4.
[ ]
A.-11.7;
B.-10.1;
C.-8.1;
D.-10.3.
[ ]
A.2.2;
B.-3.2;
C.-2.2;
D.3.2.
62.-{66-[-6+(4-84-24)]}等于 [ ]
A.-168;
B.-176;
C.-116;
D.-124.
[ ]
[ ]
A.1;
B.-1;
C.0;
D.3.
65.-793.8-[3.8-(178.2-0.2)]等于 [ ]
A.-620.4;
B.-615;
C.-619.6;
D.-611.6.
[ ]
[ ]
[ ]
A.1;
D.0.1
69.-0.32÷0.5×2÷(-2)2的值是 [ ]
[ ]
71.(-0.3)3÷(-0.1)2×(-0.012)÷(-34)的值是 [ ]
72.若a•b<|a•b|,则下列结论正确的是 [ ]
A.a<0,b<0;
B.a>0,b<0;
C.a<0,b>0;
D.a•b<0.
73.下列不等式中正确的是 [ ]
A.-22×32>-22×3>-2×32>(-2×3)2;
B.(-2×3)2>-22×3>-2×32>-22×32;
C.-2×32>-22×3>-22×32>(-2×3)2;
D.-22×3>-22×32>(-2×3)2>-2×32.
74.(2002-1002)÷104的结果是 [ ]
A.1;
B.2;
C.3;
D.以上都不对.
75.下列数中与(-7-2)5相等的数是 [ ]
A.(-7)5+(-2)5;
B.-145;
C.310;
D.-310.
76.下列各数中与2×64×(-29)相等的数是 [ ]
A.216;
B.-216;
C.-254;
D.-384.
77.下列各数中比0小的偶数是 [ ]
A.(-5-2)3;
B.(-3)3(-2)3;
C.(-1+32)3;
D.(-3)4(-2)3.
小的数是 [ ]
A.这个数;
B.这个数的相反数;
C.这个数的倒数;
D.这个数的绝对值.
79.下列各式中正确的式子是 [ ]
80.下列各式中正确的式子是 [ ]
A.(-3-2)3=33×23;
B.144÷12×12=1;
C.(32)4-(34)2=0;
D.(-3)3(-2)3=-63.
81.下列各式中错误的式子是 [ ]
A.(33)2=36;
B.28-27=27;
D.2×32×37+33×36=310.
82.下列各数中最大的数是 [ ]
A.3×32-2×22;
B.(3×3)2-(2×2)2;
C.(33)2-(22)2;
D.(33)2-(22)2.
83.下列各数中最小的数是 [ ]
A.(-3-2)3;
B.(-3)(-2)3;
C.(-3)3÷(-2)3;
D.(-3)3(-2)3.
[ ]
85.如果(-ab)125>0,则下列正确的是 [ ]
C.a>0,b<0;
D.a<0,b>0.
86.如果等式a=a2成立,则a可能的取值是 [ ]
A.1个;
B.2个;
C.3个;
D.以上结论都不对.
87.a为任意整数,则下列四组数中的数字都不可能是a2的末位数字的应是 [ ]
A.3,4,9,0;
B.2,3,7,8;
C.4,5,6,7;
D.1,5,6,9.
88.四个各不相等的整数a,b,c,d,它们的积a•b•c•d=9,那么a+b+c+d的值是 [ ]
A.0;
B.4;
C.8;
D.不能确定.
[ ]
A.2;
B.4;
[ ]
A.大于零;
B.小于零;
C.等于零;
D.以上三种情况都有可能.
91.已知n是自然数,(-7)n+8=-335,则n的值是 [ ]
A.-3;
B.3;
C.2;
D.-2.
92.已知(a-1)2+3=7,则a的值是 [ ]
A.-1;
B.3;
C.-1或3;
D.以上均不对.
[ ]
[ ]
A.0.25;
B.2.5;
C.2500;
D.25000.
[ ]
A.-0.00125;
B.0.00125;
C.-0.00005;
D.0.0005.
[ ]
A.16;
B.-16;
C.1;
D.-1.
97.3.6÷(-0.62)÷0.62×(-6)3的值是 [ ]
A.6000;
B.-6000;
C.-600;
D.600.
98.对于|-a|b2+ab2,下列说法正确的是 [ ]
A.|-a|b2+ab2恒为正数;
B.|-a|b2+ab2恒为负数;
C.|-a|b2+ab2恒为零;
D.|-a|b2+ab2恒为非负数.
99.已知a=2,b=3,则(ab-ba)(ba+ab)的值是 [ ]
A.17;
B.-17;
C.13;
D.-13.
100.|3+(-2)3×(-3)2+(-23)(-32)|与25的差是 [ ]
A.大于零;
B.小于零;
C.等于零;
D.以上都有可能.