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

Toán Lớp 6: 79-(79+2021) (-24).82+(-24).18 tìm x 2.x=(-20):10

Toán Lớp 6: 79-(79+2021)
(-24).82+(-24).18
tìm x
2.x=(-20):10

Comments ( 2 )

  1. $ a) 79-(79+2021)=79-79-2021=0-2021=-2021 $
    $ b) (-24).82+(-24).18=(-24).(82+18)=(-24).100=-2400 $ 
    $ c) 2x=(-20):10=-2 $
    $ x=-2:2=-1 $
     

  2. 79-(79+2021)
    =79-2100
    =-2021
    (-24).(82)+(-24).18
    =(-24).(82+18)
    =24.100
    =2400
    2.x=(-20):10
    2.x=-2
    x=-2/2
    x=-1
    Xin hay nhất

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