七年级有理数加减法混合计算题50道
(sinα +cosα)²=sin²α+cos²α+2sinα *cosα=1+2sinα *cosα=(1-√3)²/4=1-(√3)/2 sinα *cosα=-(√3)/4 sinα[(1-√3)/2-sinα]=-(√3)/4 sin²α-(1/2-√3/2)sinα-√3/4=0 (sinα+√3/2)(sinα-1/2)=0 sinα=1/2 或sinα=-√3/2(不在0
七年级有理数加减混合计算题
有理数的加减混合运算(乘除扔了)
1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
(31) (-5)+19/10*(-5)
(32) 11/(-17)*(-13)*12
(33) (-8)+(-10)/8*17
(34) 7-(-12)/(-1)+(-12)
(35) 12+12-19+20
(36) (-13)*(-11)*20+(-4)
(37) 17/(-2)-2*(-19)
(38) 1-12*(-16)+(-9)
(39) 13*(-14)-15/20
(40) (-15)*(-13)-6/(-9)
(41) 15*(-1)/12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14*12*(-20)*(-13)
(44) 17-9-20+(-10)
(45) 12/(-14)+(-14)+(-2)
(46) (-15)-12/(-17)-(-3)
(47) 6-3/9/(-8)
(48) (-20)*(-15)*10*(-4)
(49) 7/(-2)*(-3)/(-14)
(50) 13/2*18*(-7)
(51) 13*5+6+3
(52) (-15)/5/3+(-20)
(53) 19*4+17-4
(54) (-11)-(-6)*(-4)*(-9)
(55) (-16)+16-(-8)*(-13)
(56) 16/(-1)/(-10)/(-20)
(57) (-1)-(-9)-9/(-19)
(58) 13*20*(-13)*4
(59) 11*(-6)-3+18
(60) (-20)+(-12)+(-1)+(-12)
(61) (-19)-3*(-13)*4
(62) (-13)/3-5*8
(63) (-15)/1+17*(-18)
(64) (-13)/3/19/8
(65) (-3)/(-13)/20*5
(66) 3/12/(-18)-18
(67) 5*(-19)/13+(-6)
(68) 4+4*(-19)-11
(69) (-2)+17-5+(-1)
(70) 9+(-3)*19*(-19)
(71) (-12)-(-6)+17/2
(72) 15*(-5)-(-3)/5
(73) (-10)*2/(-1)/4
(74) (-8)*16/(-6)+4
(75) 2-11+12+10
(76) (-3)+(-20)*(-7)*(-9)
(77) (-15)+8-17/7
(78) (-14)*10+18*2
(79) (-7)+2-(-17)*19
(80) (-7)/18/1+1
(81) 11/(-9)-(-16)/17
(82) 15+5*6-(-8)
(83) (-13)*(-18)+18/(-6)
(84) 11-(-1)/11*(-6)
(85) (-4)+(-12)+19/6
(86) (-18)/(-1)/(-19)+2
(87) 9*(-8)*(-6)/11
(88) 20*(-3)*(-5)+1
(89) (-18)-2+(-11)/20
(90) 15*1+4*17
(91) 1-10+(-14)/(-1)
(92) 10+(-4)*(-19)+(-12)
(93) 15/14/5*7
(94) 8+(-13)/3+1
(95) (-14)+6+(-2)*(-14)
(96) (-5)/(-13)/4+7
(97) (-15)/(-2)/(-12)+(-2)
(98) (-17)-(-20)-20*(-10)
(99) (-7)-10-13/3
(100) (-20)+(-18)+11+9
答案:
1 -18
2 103/6
3 -37
4 9
5 -43
6 -(20/3)
7 -(199/9)
8 54/7
9 17
10 2
11 -83
12 216
13 1021/91
14 27/7
15 -1741
16 73
17 127
18 -(2885/12)
19 842
20 5
21 214
22 -41
23 -(13/28)
24 -(51/10)
25 24
26 -(268/39)
27 39/5
28 -(372/19)
29 15/11
30 -(77/19)
31 -(29/2)
32 1716/17
33 -(117/4)
34 -17
35 25
36 2856
37 59/2
38 184
39 -(731/4)
40 587/3
41 23/4
42 -37
43 43680
44 -22
45 -(118/7)
46 -(192/17)
47 145/24
48 -12000
49 -(3/4)
50 -819
51 74
52 -21
53 89
54 205
55 -104
56 -(2/25)
57 161/19
58 -13520
59 -51
60 -45
61 137
62 -(133/3)
63 -321
64 -(13/456)
65 3/52
66 -(1297/72)
67 -(173/13)
68 -83
69 9
70 1092
71 5/2
72 -(372/5)
73 5
74 76/3
75 13
76 -1263
77 -(66/7)
78 -104
79 318
80 11/18
81 -(43/153)
82 53
83 231
84 115/11
85 -(77/6)
86 20/19
87 432/11
88 301
89 -(411/20)
90 83
91 5
92 74
93 3/2
94 14/3
95 20
96 369/52
97 -(21/8)
98 203
99 -(64/3)
100 -18
有理数计算练习题 一、 有理数加法 (-9)+(-13) (-12)+27 67+(-92) (-27.8)+43.9 (-23)+7+(-152)+65 38+(-22)+(+62)+(-78) (- 2 )+0+(+ 1 )+(- 1 )+(- 1 ) 3 4 6 2
(-28)+(-34)
2 | 5 +(- 1 )| 3
2 (- 5 )+|― 1 | 3
(-8)+(-10)+2+(-1) (-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 1 )+2+(- 1 )+12 2 2 (-6.37)+(-3 3 )+6.37+2.75 4
3 2 5 5 +(-5 2 )+4 5 +(- 1 ) 3 3
二、 7-9
有理数减法 ―7―9
0-(-9) (-12.5)-(-7.5)
(-25)-(-13)
8.2―(―6.3)
(-3 1 )-5 1 2 4 ―1―(- 1 )―(+ 3 ) 2 2
(-26) +(-12)―12―18 (-23)―(-59)―(-3.5)
3 4 2 (+ 10 )―(- 7 )―(- 5 )― 10 7
(-20)-(+5)-(-5)-(-12)
5 (- 1 )―(- 8 )― 1 4 8
|-32|―(-12)―72―(-5) (- 16 )―3―(-3.2)―7 5
3 2 (+ 1 )―(- 7 )― 7 7
(+6.1)―(-4.3)―(-2.1)―5.1 (-3 2 )―(-2) 3 ―(-1 2 )―(-1.75) 3 4 3 -4 3 + 1 +(- 2 )― 5 4 6 3 2
(- 2 )―(-1 3 )―(-1 2 )―(+1.75) 3 4 3
2 -8 3 -5 7 +4 1 -3 9 4 9 6
0.5+(- 1 )-(-2.75)+ 1 4 2 (-0.5)-(-3 1 )+6.75-5 1 4 2
(+4.3)-(-4)+(-2.3)-(+4)
三、
有理数乘法
2 (- 13 )��(-0.26)
(-9)�� 2 3
1 3
(-2)��31��(-0.5)
��(-5)+ 1 ��(-13) 3
(-4)��(-10)��0.5��(-3)
4 (-0.25)��(- 7 )��4��(-7)
3 (- 8 )�� 4 ��(-1.8) 3
3 7 4 (- 7 )��(- 5 )��(- 12 )
(-8)��4��(- 1 )��(-0.75) 2
3 4 ( 7 -1 1 + 14 )��56 8 5 ( 6 ― 3 ― 7 )��36 4 9
1 4��(-96)��(-0.25)�� 48
5 7 4 (-36)��( 9 + 6 - 12 )
(- 3 )��(8- 4 -0.4) 4 3 25�� 3 -(-25)�� 1 +25�� 1 4 2 4
1 3 3 5 2 ��(2 14 - 7 )��(- 8 )��(- 16 ) 5
5 21 (-66)��〔1 22 -(- 1 )+(- 11 ) 〕 3
7 5 ( 18 + 3 - 6 + 7 )��72 4 9
1. 2100-21×53+2255
2. (103-336÷21)×15
3. 800-(2000-9600÷8)
4. 40×48-(1472+328)÷5
5. (488+344)÷(202-194)
6. 2940÷28+136×7
7. 605×(500-494)-1898
8. (2886+6618)÷(400-346)
9. 9125-(182+35×22)
10. (154-76)×(38+49)
11. 3800-136×9-798
12. (104+246)×(98÷7)
13. 918÷9×(108-99)
14. (8645+40×40)÷5
15. (2944+864)÷(113-79)
16. 8080-1877+1881÷3
17. (5011-43×85)+3397
18. 2300-1122÷(21-15)
19. 816÷(4526-251×18)
20. (7353+927)÷(801-792)
21. (28+172)÷(24+16)
22. 6240÷48+63×48
23. 950-28×6+666
24. 86×(35+117÷9)
25. 2500+(360-160÷4)
26. 16×4+6×3
27.39÷3+48÷6
28.24×4-42÷3
29.7×6-12×3
30.56÷4+72÷8
(1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
有理数加减混合运算,求简便过程 。并且教教这类题如何算
32.76+17.24-113.76-19.24
=(+32.76)+(+17.24)-(+113.76)-(+19.24)
=[(+32.76)-(+113.76)]+[(+17.24)-(+19.24)]
=(-81)+(-2)
=-83
这类题目,根据题目中的资料特征,把两个数相加或相减能得到整数的结合在一起就比较简便了。
求10题有理数的加减混合运算
(-3)-(-2.5)+(-0.5)-(+6)
12+11-8+39
45-9-91+5;
(5-6)-(7-9)
分别根据下列条件求代数式x-y-z+w的值: (1)x=-3,y=-2,z=0,w=5;
(2)x=0.3,y=-0.7,z=1.1,w=-2.1;
已知3a=a+a+a,分别根据下列条件求代数式3a的值: (1)a=-1;
(2)a=-2;
(3)a=-3;
(4)a=-0.5. 有理数加减混合运算的计算步骤如下:1. 先计算括号内的运算,按照先乘除后加减的原则进行计算。2. 将括号内的结果代入原式中,按照先乘除后加减的原则进行计算。3. 最后得到的结果即为有理数加减混合运算的答案。例如,计算表达式:3/4 + (2/3 - 1/2) × 5/61. 先计算括号内的运算:2/3 - 1/2 = (4/6) - (3/6) = 1/62. 将括号内的结果代入原式中:3/4 + 1/6 × 5/6 = 3/4 + 5/363. 按照先乘除后加减的原则进行计算:3/4 + 5/36 = 27/36 + 5/36 = 32/36 = 8/9因此,表达式3/4 + (2/3 - 1/2) × 5/6的结果为8/9。
很多同学都认为数学计算很难,我整理了一些有理数的混合运算题,大家一起来看看吧。
有理数混合运算
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
七年级有理数加减法混合计算题50道
(sinα +cosα)²=sin²α+cos²α+2sinα *cosα=1+2sinα *cosα=(1-√3)²/4=1-(√3)/2 sinα *cosα=-(√3)/4 sinα[(1-√3)/2-sinα]=-(√3)/4 sin²α-(1/2-√3/2)sinα-√3/4=0 (sinα+√3/2)(sinα-1/2)=0 sinα=1/2 或sinα=-√3/2(不在0
七年级有理数加减混合计算题
有理数的加减混合运算(乘除扔了)
1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
(31) (-5)+19/10*(-5)
(32) 11/(-17)*(-13)*12
(33) (-8)+(-10)/8*17
(34) 7-(-12)/(-1)+(-12)
(35) 12+12-19+20
(36) (-13)*(-11)*20+(-4)
(37) 17/(-2)-2*(-19)
(38) 1-12*(-16)+(-9)
(39) 13*(-14)-15/20
(40) (-15)*(-13)-6/(-9)
(41) 15*(-1)/12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14*12*(-20)*(-13)
(44) 17-9-20+(-10)
(45) 12/(-14)+(-14)+(-2)
(46) (-15)-12/(-17)-(-3)
(47) 6-3/9/(-8)
(48) (-20)*(-15)*10*(-4)
(49) 7/(-2)*(-3)/(-14)
(50) 13/2*18*(-7)
(51) 13*5+6+3
(52) (-15)/5/3+(-20)
(53) 19*4+17-4
(54) (-11)-(-6)*(-4)*(-9)
(55) (-16)+16-(-8)*(-13)
(56) 16/(-1)/(-10)/(-20)
(57) (-1)-(-9)-9/(-19)
(58) 13*20*(-13)*4
(59) 11*(-6)-3+18
(60) (-20)+(-12)+(-1)+(-12)
(61) (-19)-3*(-13)*4
(62) (-13)/3-5*8
(63) (-15)/1+17*(-18)
(64) (-13)/3/19/8
(65) (-3)/(-13)/20*5
(66) 3/12/(-18)-18
(67) 5*(-19)/13+(-6)
(68) 4+4*(-19)-11
(69) (-2)+17-5+(-1)
(70) 9+(-3)*19*(-19)
(71) (-12)-(-6)+17/2
(72) 15*(-5)-(-3)/5
(73) (-10)*2/(-1)/4
(74) (-8)*16/(-6)+4
(75) 2-11+12+10
(76) (-3)+(-20)*(-7)*(-9)
(77) (-15)+8-17/7
(78) (-14)*10+18*2
(79) (-7)+2-(-17)*19
(80) (-7)/18/1+1
(81) 11/(-9)-(-16)/17
(82) 15+5*6-(-8)
(83) (-13)*(-18)+18/(-6)
(84) 11-(-1)/11*(-6)
(85) (-4)+(-12)+19/6
(86) (-18)/(-1)/(-19)+2
(87) 9*(-8)*(-6)/11
(88) 20*(-3)*(-5)+1
(89) (-18)-2+(-11)/20
(90) 15*1+4*17
(91) 1-10+(-14)/(-1)
(92) 10+(-4)*(-19)+(-12)
(93) 15/14/5*7
(94) 8+(-13)/3+1
(95) (-14)+6+(-2)*(-14)
(96) (-5)/(-13)/4+7
(97) (-15)/(-2)/(-12)+(-2)
(98) (-17)-(-20)-20*(-10)
(99) (-7)-10-13/3
(100) (-20)+(-18)+11+9
答案:
1 -18
2 103/6
3 -37
4 9
5 -43
6 -(20/3)
7 -(199/9)
8 54/7
9 17
10 2
11 -83
12 216
13 1021/91
14 27/7
15 -1741
16 73
17 127
18 -(2885/12)
19 842
20 5
21 214
22 -41
23 -(13/28)
24 -(51/10)
25 24
26 -(268/39)
27 39/5
28 -(372/19)
29 15/11
30 -(77/19)
31 -(29/2)
32 1716/17
33 -(117/4)
34 -17
35 25
36 2856
37 59/2
38 184
39 -(731/4)
40 587/3
41 23/4
42 -37
43 43680
44 -22
45 -(118/7)
46 -(192/17)
47 145/24
48 -12000
49 -(3/4)
50 -819
51 74
52 -21
53 89
54 205
55 -104
56 -(2/25)
57 161/19
58 -13520
59 -51
60 -45
61 137
62 -(133/3)
63 -321
64 -(13/456)
65 3/52
66 -(1297/72)
67 -(173/13)
68 -83
69 9
70 1092
71 5/2
72 -(372/5)
73 5
74 76/3
75 13
76 -1263
77 -(66/7)
78 -104
79 318
80 11/18
81 -(43/153)
82 53
83 231
84 115/11
85 -(77/6)
86 20/19
87 432/11
88 301
89 -(411/20)
90 83
91 5
92 74
93 3/2
94 14/3
95 20
96 369/52
97 -(21/8)
98 203
99 -(64/3)
100 -18
有理数计算练习题 一、 有理数加法 (-9)+(-13) (-12)+27 67+(-92) (-27.8)+43.9 (-23)+7+(-152)+65 38+(-22)+(+62)+(-78) (- 2 )+0+(+ 1 )+(- 1 )+(- 1 ) 3 4 6 2
(-28)+(-34)
2 | 5 +(- 1 )| 3
2 (- 5 )+|― 1 | 3
(-8)+(-10)+2+(-1) (-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 1 )+2+(- 1 )+12 2 2 (-6.37)+(-3 3 )+6.37+2.75 4
3 2 5 5 +(-5 2 )+4 5 +(- 1 ) 3 3
二、 7-9
有理数减法 ―7―9
0-(-9) (-12.5)-(-7.5)
(-25)-(-13)
8.2―(―6.3)
(-3 1 )-5 1 2 4 ―1―(- 1 )―(+ 3 ) 2 2
(-26) +(-12)―12―18 (-23)―(-59)―(-3.5)
3 4 2 (+ 10 )―(- 7 )―(- 5 )― 10 7
(-20)-(+5)-(-5)-(-12)
5 (- 1 )―(- 8 )― 1 4 8
|-32|―(-12)―72―(-5) (- 16 )―3―(-3.2)―7 5
3 2 (+ 1 )―(- 7 )― 7 7
(+6.1)―(-4.3)―(-2.1)―5.1 (-3 2 )―(-2) 3 ―(-1 2 )―(-1.75) 3 4 3 -4 3 + 1 +(- 2 )― 5 4 6 3 2
(- 2 )―(-1 3 )―(-1 2 )―(+1.75) 3 4 3
2 -8 3 -5 7 +4 1 -3 9 4 9 6
0.5+(- 1 )-(-2.75)+ 1 4 2 (-0.5)-(-3 1 )+6.75-5 1 4 2
(+4.3)-(-4)+(-2.3)-(+4)
三、
有理数乘法
2 (- 13 )��(-0.26)
(-9)�� 2 3
1 3
(-2)��31��(-0.5)
��(-5)+ 1 ��(-13) 3
(-4)��(-10)��0.5��(-3)
4 (-0.25)��(- 7 )��4��(-7)
3 (- 8 )�� 4 ��(-1.8) 3
3 7 4 (- 7 )��(- 5 )��(- 12 )
(-8)��4��(- 1 )��(-0.75) 2
3 4 ( 7 -1 1 + 14 )��56 8 5 ( 6 ― 3 ― 7 )��36 4 9
1 4��(-96)��(-0.25)�� 48
5 7 4 (-36)��( 9 + 6 - 12 )
(- 3 )��(8- 4 -0.4) 4 3 25�� 3 -(-25)�� 1 +25�� 1 4 2 4
1 3 3 5 2 ��(2 14 - 7 )��(- 8 )��(- 16 ) 5
5 21 (-66)��〔1 22 -(- 1 )+(- 11 ) 〕 3
7 5 ( 18 + 3 - 6 + 7 )��72 4 9
1. 2100-21×53+2255
2. (103-336÷21)×15
3. 800-(2000-9600÷8)
4. 40×48-(1472+328)÷5
5. (488+344)÷(202-194)
6. 2940÷28+136×7
7. 605×(500-494)-1898
8. (2886+6618)÷(400-346)
9. 9125-(182+35×22)
10. (154-76)×(38+49)
11. 3800-136×9-798
12. (104+246)×(98÷7)
13. 918÷9×(108-99)
14. (8645+40×40)÷5
15. (2944+864)÷(113-79)
16. 8080-1877+1881÷3
17. (5011-43×85)+3397
18. 2300-1122÷(21-15)
19. 816÷(4526-251×18)
20. (7353+927)÷(801-792)
21. (28+172)÷(24+16)
22. 6240÷48+63×48
23. 950-28×6+666
24. 86×(35+117÷9)
25. 2500+(360-160÷4)
26. 16×4+6×3
27.39÷3+48÷6
28.24×4-42÷3
29.7×6-12×3
30.56÷4+72÷8
(1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
有理数加减混合运算,求简便过程 。并且教教这类题如何算
32.76+17.24-113.76-19.24
=(+32.76)+(+17.24)-(+113.76)-(+19.24)
=[(+32.76)-(+113.76)]+[(+17.24)-(+19.24)]
=(-81)+(-2)
=-83
这类题目,根据题目中的资料特征,把两个数相加或相减能得到整数的结合在一起就比较简便了。
求10题有理数的加减混合运算
(-3)-(-2.5)+(-0.5)-(+6)
12+11-8+39
45-9-91+5;
(5-6)-(7-9)
分别根据下列条件求代数式x-y-z+w的值: (1)x=-3,y=-2,z=0,w=5;
(2)x=0.3,y=-0.7,z=1.1,w=-2.1;
已知3a=a+a+a,分别根据下列条件求代数式3a的值: (1)a=-1;
(2)a=-2;
(3)a=-3;
(4)a=-0.5. 有理数加减混合运算的计算步骤如下:1. 先计算括号内的运算,按照先乘除后加减的原则进行计算。2. 将括号内的结果代入原式中,按照先乘除后加减的原则进行计算。3. 最后得到的结果即为有理数加减混合运算的答案。例如,计算表达式:3/4 + (2/3 - 1/2) × 5/61. 先计算括号内的运算:2/3 - 1/2 = (4/6) - (3/6) = 1/62. 将括号内的结果代入原式中:3/4 + 1/6 × 5/6 = 3/4 + 5/363. 按照先乘除后加减的原则进行计算:3/4 + 5/36 = 27/36 + 5/36 = 32/36 = 8/9因此,表达式3/4 + (2/3 - 1/2) × 5/6的结果为8/9。
很多同学都认为数学计算很难,我整理了一些有理数的混合运算题,大家一起来看看吧。
有理数混合运算
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)