78×18.8+75×21.2简便计算方法?

2024-12-31 23:00:47
推荐回答(3个)
回答1:

关于算式78×18.8+75×21.2的简便计算,详细的过程如下:
78×18.8+75×21.2
=(78-3)×18.8+75×21.2
=(18.8+21.2)×75
=40×75
=3000

回答2:

78×18.8+75×21.2简便计算方法
=78x18.8+(78-3)x21.2
=78x18.8+78x21.2-3x21.2
=78x(18.2+21.2)-63.6
=78x40+63.6
=3120-63.6
=3054.4

回答3:

=(75+3)*18.8+75*21.2
=75*18.8+3*18.8+75*21.2
=75*(18.8+21.2)+3*18.8
=75*40+3*18.8
=300+56.4
=356.4