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

Toán Lớp 6: a) (2.2 – 3.7) b) {[(35 – 18).6 + 78] : 9} + 24 c) |- 2012| + 2.(|-12| – 2015) – |2012|

Toán Lớp 6: a) (2.2 – 3.7)
b) {[(35 – 18).6 + 78] : 9} + 24
c) |- 2012| + 2.(|-12| – 2015) – |2012|

Comments ( 2 )

  1. a. 
    (2.2-3.7)
    =4-21
    =-17
    b.
     {[(35 – 18).6 + 78] : 9} + 24
    =[(17.6+78):9]+24
    =[(102+78):9]+24
    =(180:9)+24
    =20+24
    =44
    c. 
    |- 2012| + 2.(|-12| – 2015) – |2012|
    = 2012 + 2.( 12-2015) – 2012
    = 2012 + 2. (-2003) -2012
    =-4006
    #dungzz2367 

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    a) (2.2-3.7)
    =4-21
    =-17
    b){[(35-18).6+78]/9}+24
    =[(17.6+78)/9}+24
    =[(102+78)/9}+24
    =(180/9)+24
    =20+24
    =44
    c)|-2012| +2.(|-12|-2015)-|2012|
    =2012+2.(12-2015)-2012
    =2012+2.(-2003)-2012
    =2012+(-4006)-2012
    =-4006
     

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

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