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

Toán Lớp 5: Tìm x 10/3 x 1/2 – ( 1/2 x x – 1/3) + 1/5 = 6/5

Toán Lớp 5: Tìm x
10/3 x 1/2 – ( 1/2 x x – 1/3) + 1/5 = 6/5

Comments ( 2 )

  1. 10/3 times 1/2 – ( 1/2 x times – 1/3) + 1/5 = 6/5
    => 5/3-(1/2x times 1/3)=6/5-1/5
    => 5/3-(1/2x times 1/3)=1
    => 1/2x times 1/3=5/3-1
    => 1/2x times 1/3=2/3
    => 1/2x=2/3:1/3
    => 1/2x=2
    => x=2:1/2
    => x=4

  2. Giải đáp:
    x=2
    Lời giải và giải thích chi tiết:
    10/3×1/2-(1/2×x-1/3)+1/5=6/5
            10/6-(1/2×x-1/3)        =6/5-1/5
                       1/2×x-1/3        =10/6-5/5
                       1/2×x               =5/3-1+1/3
                               x               =(5-3+1)/3:1/2
                               x               =3/3×2
                               x               =1×2
                               x               =2
    _______________________
    #phamuyen15032008

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