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

Toán Lớp 5: Y x 0,6 + y : 2 + y : 2,5 =3,12

Toán Lớp 5: Y x 0,6 + y : 2 + y : 2,5 =3,12

Comments ( 2 )

  1. y times 0,6 + y : 2 + y : 2,5 =3,12
    =>y times 3/5 + y times 1/2 + y times 2/5 =78/25
    =>y times (3/5+1/2+2/5)=78/25
    => y times 3/2=78/25
    =>y=78/25:3/2=78/25 times 2/3
    =>y=52/25

  2. y x 0,6 + y:2 + y:2,5 =3,12
    y x 0,6 + y x 0,5 + y x 0,4 = 3,12
    y x (0,6+0,5+0,4) = 3,12
    y x 1,5 = 3,12
    y = 3,12 : 1,5
    y =2,08

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

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