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

Toán Lớp 6: c) 512-87+[(-12)-(-487)] d) [113+(-56)]-[(-56)-(-113)]

Toán Lớp 6: c) 512-87+[(-12)-(-487)] d) [113+(-56)]-[(-56)-(-113)]

Comments ( 2 )

  1. c)
    512 – 87 + [ ( -12 ) – ( -487 ) ]
    = 512 – 87 + [ -12 + 487 ]
    = 512 – 87 – 12 + 487
    = ( 512 – 12 ) + ( -87 + 487 )
    = 500 + 400
    = 900
    d)
    [ 113 + ( -56 ) ] – [ ( -56 ) – ( -113 ) ]
    = [ 113 – 56 ] – [ -56 + 113 ]
    = [ 113 – 56 ] – [ 113 – 56 ]
    = 0

  2. Giải đáp:
    c) 512 – 87 + [(-12) – (-487)]
    = 512 – 87 + [(-12) + 487]
    = 512 – 87 + [-(487 – 12)]
    = 512 – 87 + 475
    = 425 + 475
    = 900
    d) [113 + (-56)] – [(-56) – (-113)]
    = [+(113 – 56)] – [(-56) + 113]
    = 57 – [+(113 – 56)]
    = 57 – 57
    = 0
    #tambip

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

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