回答:
88.8×9.9+88.8
=88.8×(10-0.1)+88.8
=888-8.88+88.8
=888-9+0.12+90-1.2
=888+81-1.08
=969-1.08
=967.92
运用了乘法分配律
简便计算如下
88.8×9.9+88.8
=88.8×9.9+8.88+79.92
=88.8×(9.9+0.1)+79.92
=888+79.92
=967.92
原式=88.8×(9.9+1)
=88.8×(10+0.9)
=888+79.92
=967.92.
88.8×(9.9+1)
剩下的自己算