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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: Bài 1: Tính. 5/8 – 2/5 b.1 1/10 – 3/4 c. 2/3 + (1 )/2 – 5/6

Toán Lớp 5: Bài 1: Tính.
5/8 – 2/5 b.1 1/10 – 3/4 c. 2/3 + (1 )/2 – 5/6

Comments ( 2 )

  1. 5/8-2/5=25/40-16/40=9/40
    11/10-3/4=11/10-3/4=44/40-30/40=7/20
    2/3+1/2-5/6=4/6+3/2-5/6=1/3

  2. 1.
    5/8 – 2/5
    = 25/40 – 16/40
    -= (25 – 16)/40
    = 9/40
    2.
    1 1/10 – 3/4
    = 11/10 – 3/4
    = 22/20 – 15/20
    = 7/20
    3.
    2/3 + 1/2 – 5/6
    = 2/3 + 1/2 – 5/6
    = 4/6 + 3/6 – 5/6
    = (4 + 3 – 5)/6
    = 1/3

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222-9+11+12:2*14+14 = ? ( )

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