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

Toán Lớp 6: (+2)+(+5)= (+3)+(+17)= (+12)+(+7)=

Toán Lớp 6: (+2)+(+5)= (+3)+(+17)= (+12)+(+7)=

Comments ( 2 )

  1. (+2)+(+5)
    = +(2+5)
    = +7
    (+3)+(+17)
    +(3+17)
    =+ 20
    (+12)+(+7)
    = +(12+7)
    = +19
    $#Na$
     

  2. a)  ( + 2 ) + ( + 5 )
    = 2 + 5
    = 7
    b) ( + 3 ) + ( + 17 )
    = 3 + 17
    = 20
    c) ( + 12 ) + ( + 7 )
    = 12 + 7
    = 19

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

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