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

Toán Lớp 6: -2/9:8/36-4/15.3/5 75%+(1,25-2 và 3/4):3/2

Toán Lớp 6: -2/9:8/36-4/15.3/5
75%+(1,25-2 và 3/4):3/2

Comments ( 2 )

  1. a) -2/9 : 8/36 – 4/15 . 3/5
    = -2/9 . 9/2 – 4/25
    = -1 – 4/25
    = -25/25 – 4/25
    = -29/25
    b) 75% + ( 1,25 – 2 3/4) : 3/2
    = 3/4 + ( 5/4 – 11/4) : 3/2
    = 3/4 + (-3/2) . 2/3
    = 3/4 + (-1)
    = 3/4 + (-4/4)
    = -1/4

  2. -2/9 : 8/36 – 4/15 . 3/5
    = -2/9 : 2/9 – 4/15 . 3/5
    = -2/9 . 9/2 – 4/25
    = -1 – 4/25
    = -25/25 – 4/25
    = -29/15
    75% + (1,25 – 2 3/4) : 3/2
    = 3/4 + (5/4 – 11/4) . 2/3
    = 3/4 – 3/2 . 2/3
    = 3/4 – 1
    = 3/4 – 4/4
    = -1/4
     

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