简便运算怎么做?

2024-11-08 14:13:58
推荐回答(3个)
回答1:


如图所示

回答2:

13/20-(13/20-1/91)
=13/20-13/20+1/91
=0+1/91
=1/91
(1/4+2/9)×3.6×4
=1/4×3.6×4+2/9×3.6×4
=3.6+3.2
=6.8

回答3: