(8.9乘7.9减7.9)除以7.9 简便运算
问题描述:
(8.9乘7.9减7.9)除以7.9 简便运算
答
=8.9×7.9÷7.9-7.9÷7.9
=8.9-1
=7.9
(8.9乘7.9减7.9)除以7.9 简便运算
=8.9×7.9÷7.9-7.9÷7.9
=8.9-1
=7.9