小学奥数资料目录
6.25×8.27×16+3.75×82.7×8
= 6.25×8.27×16+3.75×8.27×80
=( 6.25×16+3.75×80) ×8.27
=(6.25×2×8+37.5×8)×8.27
=(12.5+37.5)×8×8.27
=50×8×8.27
=400×8.27
=4×827
=3308
1+166)*83+(2+167)*83+(3+168)*83+169
=83(1+2+3+166+167+168)+169
=83*3*169+169
=169*250
=42250
小学奥数资料目录
6.25×8.27×16+3.75×82.7×8
= 6.25×8.27×16+3.75×8.27×80
=( 6.25×16+3.75×80) ×8.27
=(6.25×2×8+37.5×8)×8.27
=(12.5+37.5)×8×8.27
=50×8×8.27
=400×8.27
=4×827
=3308
1+166)*83+(2+167)*83+(3+168)*83+169
=83(1+2+3+166+167+168)+169
=83*3*169+169
=169*250
=42250