1、 2/3- 5/6 × 3/10 + 3/2 - 知识问答

1、 2/3- 5/6 × 3/10 + 3/2 2、7/4÷（2/3+1/2）×4/5 怎么简算?

2个回答

2/3-5/6×3/10+3/2
=2/3-1/4+3/2
=48/12-3/12+18/12
=21/4
7/4÷(2/3+1/2)×4/5
=(7/4×4/5)÷(2/3+1/2)
=7/5÷(4/6+3/6)
=7/5÷7/6
=7/5×6/7
=6/5

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