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

Toán Lớp 5: Tính 5/7 + 7/6 ; 7/12 + 17/18 ; 11/4 – 15/16 ; 3 – 13/9 ; 9/8 – 15/32 ; 4 + 35/55 ; 5/6 – 5/8 ; 196/64 – 2

Toán Lớp 5: Tính
5/7 + 7/6 ; 7/12 + 17/18 ; 11/4 – 15/16 ; 3 – 13/9 ; 9/8 – 15/32 ; 4 + 35/55 ; 5/6 – 5/8 ; 196/64 – 2

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    5/7 + 7/6
    = 30/42 + 49/42
    = 79/42
    7/12 + 17/18
    = 63/108 + 102/108
    = 165/108
    11/4 – 15/16
    = 44/16 – 15/16
    = 29/16
    3 – 13/9
    = 27/9 – 13/9
    = 14/9
    9/8 – 15/32
    = 36/32 – 15/32
    = 21/32
    4 + 35/55
    = 44/11 + 7/11
    = 51/11
    5/6 – 5/8
    = 20/24 – 15/24
    = 5/24
    196/64 – 2
    = 196/64 – 128/64
    = 68/64
    = 17/16

  2. 5/7 + 7/6 = 30/42 + 49/42 = 79/42
    7/12 + 17/18 = 126/216 + 204/216 = 330/216
    11/4 – 15/16 = 44/16 – 15/16 = 29/16
    3 – 13/9 = 27/9 – 13/9 = 14/9
    9/8 – 15/32 = 36/32 – 15/32 = 21/32
    4 + 35/55 = 220/55 + 35/55 = 255/551
    5/6 – 5/8 = 40/48 – 30/48 = 10/48
    196/64 – 2 = 196/64 – 128/64 = 68/64
    #dtkc

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

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