能简算要简算

2024-12-28 01:13:16
推荐回答(2个)
回答1:

1.
=5/15×(2/5+1/3)×6/5
=5/15×6/5×(2/5+1/3)
=2/5×(2/5+1/3)
=2/5×11/15
=22/75
2.
=2.5×0.4×2013/2014
=2013/2014
3.
=7.2÷(0.8×0.9)
=7.2÷0.72
=10

回答2:

不会