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

Toán Lớp 5: Y : 0,75 + Y : 0,5 = 3/10 Y x 3/4 – Y x0,25 = 1/2

Toán Lớp 5: Y : 0,75 + Y : 0,5 = 3/10

Y x 3/4 – Y x0,25 = 1/2

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    Y : 0,75 + Y : 0,5 = 3/10
    Y×4/3+Y×2/1=3/10
    Y×(4/3+2/1)=3/10
    Y×10/3=3/10
    Y=3/10:10/3
    Y=9/100
    _______________________________________________________
    Y × 3/4 – Y ×0,25 = 1/2
    Y×(3/4-0,25)=1/2
    Y×(3/4-1/4)=1/2
    Y×1/2=1/2
    Y=1/2:1/2
    Y=1
     

  2. a)y:0,75+y:0,5=3/10
    yxx4/3+yxx2=3/10
    yxx(4/3+2)=3/10
    yxx10/3=3/10
    y=3/10:10/3
    y=9/100
    b)yxx3/4-yxx0,25=1/2
    yxx(3/4-0,25)=1/2
    yxx1/2=1/2
    y=1/2:1/2
    y=1

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