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

Toán Lớp 6: Tính: 19.43 + (-20).43 – (-40)

Toán Lớp 6: Tính:
19.43 + (-20).43 – (-40)

Comments ( 2 )

  1. $\text{19.43(-20).43-(-40)}$
    $\text{=43.[19+(-20]+40}$
    $\text{=43.(-1)-40}$
    $\text{=-43+40}$
    $\text{=-3}$
     

  2. 19 * 43 + (-20) * 43 – (-40)
    = 43 * [19 + (-20)] + 40
    = 43 * (-1) + 40
    = -43 + 40
    = -3
     

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

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