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

Toán Lớp 6: Giải giúp mk với nha : -(-5) +(-678) (-55) –(–550)

Toán Lớp 6: Giải giúp mk với nha :
-(-5) +(-678)
(-55) –(–550)

Comments ( 2 )

  1. -(-5)+(-678)

    = 5+(-678)

    = -673

    (-55)-(-550)

    = (-55)+550

    = 495

     

  2. +) – ( -5 ) + ( -678 )

    = 5 + ( -678 )

    = 5 – 678

    = -678 + 5

    = – ( 678 – 5 )

    = – 673

    _______________________

    +) ( -55 ) – ( – 550 )

    = -55 + 550

    = 550 – 55

    = 495

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