2/5:12/15*1/5 3/2*12/15+1/5 5/6-4/5+1/5 5/3-1/2:3/2 4/5:12/15*1/5 15/12-4/2:16/5

0 bình luận về “2/5:12/15*1/5 3/2*12/15+1/5 5/6-4/5+1/5 5/3-1/2:3/2 4/5:12/15*1/5 15/12-4/2:16/5”

1. `a, 2/5:12/15*1/5`

   `=1/5(2/5÷12/15)`

   `=1/2×1/5`

   `=1/10`

   `b,3/2*12/15+1/5`

   `=1/5+(3/2×12/15)`

   `=6/5+1/5`

   `=7/5`

   `c,5/6-4/5+1/5`

   `=1/5+(5/6-4/5)`

   `=1/30+1/5`

   `=7/30`

   `d,5/3-1/2:3/2`

   `=5/3-(1/2:3/2)`

   `=4/3`

   `e,4/5:12/15*1/5`

   `=1/5(4/5÷12/15)`

   `=1/5`

   `f,15/12-4/2:16/5`

   `=15/12-5/8`

   `=5/8`

    Vậy …………………….

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2. 2/5÷12/15×1/5

   =(2/5÷12/15)×1/5

   =1/2×1/5

   =1/10

   3/2×12/15+1/5

   =(3/2×12/15)+1/5

   =6/5+1/5

   =7/5

   5/6-4/5+1/5

   =(5/6-4/5)+1/5

   =1/30+1/5

   =7/30

   5/3-1/2÷3/2

   =5/3-(1/2÷3/2)

   =5/3-1/3

   =4/3

   4/5÷12/15×1/5

   =(4/5÷12/15)×1/5

   =1×1/5

   =1/5

   15/12-4/2÷16/5

   =15/12-(4/2÷16/5)

   =15/12-5/8

   =5/8

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