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

Toán Lớp 6: a/ 2834+275-2833-265 b/ (11+12+13)-(1+2+3)

Toán Lớp 6: a/ 2834+275-2833-265
b/ (11+12+13)-(1+2+3)

Comments ( 2 )

  1. $\text{a)2834 + 275 – 2833 – 265}$
    $\text{= (2834 – 2833) + (275 – 265)}$
    $\text{= 1 + 10}$
    $\text{= 11}$
    $\text{b)(11 + 12 + 13) – (1 + 2 + 3)}$
    $\text{= 11 + 12 + 13 – 1 – 2 – 3}$
    $\text{= (11 – 1) + (12 – 2) + (13 – 3)}$
    $\text{= 10 + 10 + 10}$
    $\text{= 10 × 3}$
    $\text{= 30}$
     

  2. $\text{Giải đáp:}$
    $\text{ a) = 11}$
    $\text{ b) = 30}$
     $\text{Lời giải và giải thích chi tiết:}$
     a) 2834 + 275 – 2833 – 265
    =(2834 – 2833 ) + ( 275 – 265)
    = 1 + 10
    = 11
    b) (11+12+13)-(1+2+3)
    = 11+12+13-1-2-3
    = ( 11 – 1 ) + ( 12 – 2 ) + ( 13 – 3)
    = 10 + 10 + 10
    = 10 * 3
    = 30

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

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