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

Toán Lớp 6: Tính: @,(-6)+8+(-10)+12+(-14)+16 b,5+(-7)+9+(-11)+13+(-15)

Toán Lớp 6: Tính:
@,(-6)+8+(-10)+12+(-14)+16
b,5+(-7)+9+(-11)+13+(-15)

Comments ( 2 )

  1. a, (-6) + 8 -10 +12-14+16
    =2-10+12-14+16
    =16-10
    =6
    b, 5 -7 +9-11+13-15
    = -2+9-11+13-15
    =7-11+13-15
    =-4+13-15
    =-6

  2. a, (-6) + 8 + (-10) + 12 + (-14) + 16
    = -6 + 8 – 10 + 12 – 14 + 16
    = (-6 + 8) – (10 – 12) – (14 – 16)
    = 2 – (-2) – (-2)
    = 2 + 2 + 2
    = 6
    b, 5 + (-7) + 9 + (-11) + 13 + (-15)
    = 5 – 7 + 9 – 11 + 13 – 15
    = (5 – 7) + (9 – 11) + (13 – 15)
    = (-2) + (-2) + (-2)
    = -6
    #Mon
     

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

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