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

Toán Lớp 6: TÍNH:(123-37)-123; B) (-224)-(34-224);c) 126-(126-33)

Toán Lớp 6: TÍNH:(123-37)-123; B) (-224)-(34-224);c) 126-(126-33)

Comments ( 2 )

  1. a) (123 – 37) – 123
    = 86 – 123
    = -37
    b) (-224) – (34 – 224)
    = (-224) – (-190)
    = -(224 – 190)
    = -34
    c) 126 – (126 – 33)
     = 126 – 93
    = 33

  2. a) (123-37)-123
    =123-37-123
    = (123-123)-37
    = -37
    b) (-224)-(34-224)
    = (-224)-34+224
    = [(-224)+224]-34
    = -34
    c) 126-(126-33)
    = 126-126+33
    = (126-126)+33
    = 33

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

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