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

Toán Lớp 2: `a.4+5+6+7-4-5-6-7` `b.1+1+2-4+5-4`

Toán Lớp 2: a.4+5+6+7-4-5-6-7
b.1+1+2-4+5-4

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     a.4 + 5 + 6 + 7 – 4 – 5 – 6 – 7
    = ( 4 – 4 ) + ( 5 – 5 ) + ( 6 – 6 ) + ( 7 – 7)
    = 0 + 0 + 0 + 0
    = 0
    b. 1 + 1 + 2 – 4 + 5 – 4
    = 2 + 2 – 4 + 5 – 4
    = 4 – 4 + 5 – 4
    = 0 + 5 – 4
    = 5 – 4
    = 1
    Chúc bn làm bài thật tốt!
     

  2. a, 4+5+6+7-4-5-6-7
    =(4-4)+(5-5)+(6-6)+(7-7)
    =0+0+0+0=0
    text(___________________________________________)
    b, 1+1+2-4+5-4
    =(1+1+2)-4+5-4
    =4-4+5-4
    =0+5-4=1
    Xin CTLHN

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

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