75乘以4加75乘以5怎么算省事?

2025-04-06 04:14:21
推荐回答(2个)
回答1:

都是75属于同类,可以写成75乘9

回答2:

75×4+75×5
=75×(4+5)
=75×9
=75×(10-1)
=750-75
=675