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

Toán Lớp 6: a) 1+2+3+4+5+6+7 b) 28-10+60×3 c) 39+57-10:2

Toán Lớp 6: a) 1+2+3+4+5+6+7
b) 28-10+60×3
c) 39+57-10:2

Comments ( 2 )

  1. $a)$ $1+2+3+4+5+6+7$
    $=28$
    $b)$ $28-10+60\times \:3$
    $=28-10+(60\times \:3)$
    $=28-10+180$
    $=198$
    $c)$ $39+57-10\div \:2$
    $=39+57-(10\div \:2)$
    $=39+57-5$
    $=91$
     

  2. $#AS$
    a) 1 + 2 + 3 + 4 + 5 + 6 + 7
    = 3 + 3 + 4 + 5 + 6 + 7
    = 6 + 4 + 5 + 6 + 7
    = 10 + 5 + 6 + 7
    = 15 + 6 + 7
    = 21 + 7
    = 28
    b) 28 – 10 + 60 xx 3
    = 28 – 10 + 180
    = 18 + 180
    = 198
    c) 39 + 57 – 10 : 2
    = 39 + 57 – 5
    = 96 – 5
    = 91

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