78×22+39×56如何简便运算?

2024-12-31 00:39:10
推荐回答(3个)
回答1:

简便计算过程方法如下
解:78×22+39×56
=1716+39×56
=39×44+39×56
=39×(44+56)
=39×100
=3900

回答2:

78×22+39×56
=39×2×22+39×56
=39×(44+56)
=39×100
=3900

回答3:

原式
=1716+39×56
=39×44+39×56
=39×(44+56)
=39×100
=3900