用简便方法计算38x7+65x7

用简便方法计算38x7+65x7
2025-04-27 06:46:16
推荐回答(2个)
回答1:

=(38+65)x7
=(100+3)x7
=100x7+3x7
=700+21
=721

回答2:

(38+65)×7