1.25乘78+1.25的简便计算

1.25乘78+1.25的简便计算
2025-03-17 13:47:21
推荐回答(3个)
回答1:

1.25乘78+1.25的简便计算
解:
采用分配律,
原式=1.25x78+1.25
=1.25x(78+2)-1.25
=1.25x80-1.25
=100-1.25
=98.75

回答2:

1.25乘78+1.25
=1.25×(78+1)
=1.25×(80-1)
=1.25×80-1.25×1
=100-1.25
=98.75

回答3:

1.25*78+1.25
=1.25*79
=1.25*80-1.25
=100-1.25
=98.75