应用乘法运算定律,把12.5×71×0.8改写成(),计算才简便.A.12.5×0.8×71 B.12.5×4×71×0.2C.(12.5×4)×(71×0.2) C.12.5×71×8÷0.1
问题描述:
应用乘法运算定律,把12.5×71×0.8改写成(),计算才简便.A.12.5×0.8×71 B.12.5×4×71×0.2
C.(12.5×4)×(71×0.2) C.12.5×71×8÷0.1
答
c
答
选择A
12.5x71x0.8
=12.5x0.8x71
=10x71
=710
运用乘法交换律