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

Toán Lớp 4: 2/3+7/8= 7/9-3/5= 9/6×2/6= 7/8:3/5=

Toán Lớp 4: 2/3+7/8=
7/9-3/5=
9/6×2/6=
7/8:3/5=

Comments ( 2 )

  1. 2/3 + 7/8 = 16/24+21/24=37/24
    7/9-3/5=35/45-27/45=8/45
    9/6 xx 2/6 = 18/36=1/2
    7/8:3/5=7/8 xx 5/3 = 35/24

  2. 2/3 + 7/8 = 16/24 + 21/24 = {16 + 21}/24 = 37/24
    7/9 – 3/5 = 35/45 – 27/45 = {35 – 27}/45 = 8/45
    9/6 xx 2/6 = {9 xx 2}/{6 xx 6} = 18/36 = 1/2
    7/8 : 3/5 = 7/8 xx 5/3 = {7 xx 5}/{8 xx 3} = 35/24
     

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

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