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

Toán Lớp 4: hu hu em ko bt giải b này 50-20+10-40+20+10= bao nhiu vậy mn

Toán Lớp 4: hu hu em ko bt giải b này
50-20+10-40+20+10= bao nhiu vậy mn

Comments ( 2 )

  1. 50 – 20 + 10 – 40 + 20 + 10
    = 30 + 10 – 40 + 20 + 10
    = 40 – 40 + 20 + 10
    = 0 + 20 + 10
    = 20 + 10
    = 30

  2. $\text{ 50 – 20 + 10 – 40 + 20 + 10 }$
    $\text{ = ( 50 – 40 ) + ( -20 + 20 ) + ( 10 + 10 ) }$
    $\text{ = 10 + 0 + 20 }$
    $\text{ = 30 }$
     

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

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