3/4×1/5+3/4×2/5+0.75×3/5-3/4简便运算!有智者快来!马上就要交作业了!

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3/4×1/5+3/4×2/5+0.75×3/5-3/4简便运算!有智者快来!马上就要交作业了!
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3/4×1/5+3/4×2/5+0.75×3/5-3/4简便运算!有智者快来!马上就要交作业了!
3/4×1/5+3/4×2/5+0.75×3/5-3/4
简便运算!有智者快来!马上就要交作业了!

3/4×1/5+3/4×2/5+0.75×3/5-3/4简便运算!有智者快来!马上就要交作业了!
3/4*1/5+3/4*2/5+0.75*3/5-3/4
=3/4*1/5+3/4*2/5+3/4*3/5-3/4
=3/4*(1/5+2/5+3/5-1)
=3/4*1/5
=3/20
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3/4×1/5+3/4×2/5+0.75×3/5-3/4
=¾×1/5+¾×﹙-1+2/5+3/5)
=¾×1/5
=3/20

3/4×1/5+3/4×2/5+0.75×3/5-3/4
=3/4×1/5+3/4×2/5+3/4×3/5-3/4
=3/4×(1/5+2/5+3/5-1)
=3/4×1/5
=3/20