2/3+1/8-5/24 1/3+2/5-(2/5+1/6) hỗn số 1 1/4-0.25 (-3/8+1/6) 3/8+5/8:-15/16

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1. Đáp án:

    Bài của bn

   Trả lời

2. a) 2/3 + 1/8 – 5/24

   = 19/24 – 5/24

   = 14/24

   = 7/12

   b) 1/3 + 2/5 – (2/5 + 1/6)

   = 1/3 + 2/5 – 2/5 – 1/6

   = (1/3 – 1/6) + (2/5 – 2/5)

   = 1/6 + 0

   = 1/6

   c) 1$\frac{1}{4}$ – 0,25.(-3/8 + 1/6)

   = 5/4 – 1/4.(-5/24)

   = 5/4 – (-5/96)

   = 5/4 + 5/96

   = 125/96

   d) 3/8 + 5/8 : (-15/16)

   = 3/8 + 5/8 x (-16/15)

   = 3/8 + (-2/3)

   = 3/8 – 2/3

   = -7/24

    

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