456×26-56×26和68×92+32×92怎么巧算

问题描述:

456×26-56×26和68×92+32×92怎么巧算

456×26-56×26
=(456-56)×26
=400×26
=10400
68×92+32×92
=(68+32)×92
=100×92
=9200
就是考了乘法对加减法的分配率.