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

Toán Lớp 6: 386 – 287 + 386 – 13 + 65 Giúp vs

Toán Lớp 6: 386 – 287 + 386 – 13 + 65
Giúp vs

Comments ( 2 )

  1. $\text{386 – 287 + 386 – 13 + 65}$
    $\text{=(386+386)+(-287-13)+65}$
    $\text{=772+[-(287+13)]+65}$
    $\text{=772+(-300)+65}$
    $\text{=772-300+65}$
    $\text{=472+65}$
    $\text{=537}$

  2. 386 – 287 + 386 – 13 + 65
    = ( 386 + 386 ) + ( -287 – 13 ) + 65
    = 772 + ( -300 ) + 65
    = 472 + 65
    = 537
     

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