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

Toán Lớp 6: Đề: Thực hiện phép tính (Có $3$ câu thôi): $a)$ $52$ $-$ $174$ $-$ $(-48)$ $+$ $(-126)$ $b)$ $80$ $-$ $[$ $14$ $-$ $(12 – 4)^{2}$ $]$

Toán Lớp 6: Đề: Thực hiện phép tính (Có $3$ câu thôi):
$a)$ $52$ $-$ $174$ $-$ $(-48)$ $+$ $(-126)$
$b)$ $80$ $-$ $[$ $14$ $-$ $(12 – 4)^{2}$ $]$
$c)$ $3^{3}$ $.$ $20$ $-$ $3^{3}$ $.$ $17$

Comments ( 2 )

  1. a)
    =100-300
    =-200
    b)80-[14-(12-4)²]
    =80-(14-8²)
    =80-(14-64)
    =80-(-50)
    =80+50
    =130
    c)3³.20-3³.17
    =3³(20-17)
    =3³.3
    =3^4
    =81
     

  2. $\text{ a) 52 – 174 – ( – 48 ) + ( – 126 ) }$
    $\text{  =    – 122   – ( – 48 ) + ( – 126 )  }$
    $\text{  =    – 122   +   48  + ( – 126 )}$
    $\text{  =            – 74         + ( – 126 )}$
    $\text{  =                  – 200 }$
    —————————————————
    $\text{ b) 80 – [ 14 – ( 12 – 4 )² ] }$
    $\text{  = 80 – [ 14 – 8² ] }$
    $\text{  = 80 – [ 14 – 64 ]}$
    $\text{  = 80 – (-50) }$
    $\text{  = 80  +  50 }$
    $\text{  = 130 }$
    ——————————————————–
    $\text{ c) 3³ . 20 – 3³ . 17 }$
    $\text{  = 3³ . ( 20 – 17 ) }$
    $\text{  = 27 . 3 }$
    $\text{  = 81 }$
    _________________________
    $\text{#bich2k9-.-}$

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