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

Toán Lớp 5: 12+x/42=5/6 6,28×18,24+18,24×3,72

Toán Lớp 5: 12+x/42=5/6
6,28×18,24+18,24×3,72

Comments ( 2 )

  1. Lời giải:
    1)
    12+x/42=5/6
    x/42=5/6-12
    x/42=-67/6
    x/42=-469/42
    Vậy x=-469
    2)
    6,28×18,24+18,24×3,72
    =18,24×(6,28+3,72)
    =18,24×10
    =182,4

  2. a) 12 + x/42 = 5/6
    x/42 = 5/6 – 12
    x/42 = (-67)/6
    x/42 = (-469)/42
    x = -469
    b) 6,28 × 18,24 + 18,24 × 3,72
    = 18,24 × ( 6,28 + 3,72 )
    = 18,24 × 10
    = 182,4
    @Rin

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