Question

99乘87.5加87.5简便运算 75乘4.67加17.9乘2.5 简便运算 808乘0.125简便运算

Answer 1

99乘87.5=（100-1）乘87.5=8750-87.5=8662.5
75乘4.67+17.9乘2.5=0.75X467+179X0.25=0.25X3X467+179X0.25=0.25X（1401+179）=0.25X1580=1/4X1580=395
808乘0.125=808X1/8=101

Answer 2

(99+1)*87.5
75/30*(4.67*30+17.9)
800*0.125+8*0.125

Answer 3

(99+1)×87.5
2.5×3×46.7+17.9×2.5
800×0.125+8×0.125