(45÷7)÷(9÷7)怎么简便计算

问题描述:

(45÷7)÷(9÷7)怎么简便计算

♂依媛晓晓,
(45÷7)÷(9÷7)
=45÷7÷9×7 (括号前是除号,去括号要变符号)
=(45÷9)×(7÷7)
=5×1
=5