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

Toán Lớp 6: a) 20 – [ 30 – ( 5 – 1 ) ² ] b) 2 ³ . 17 – 2 ³ . 14 giúp em với

Toán Lớp 6: a) 20 – [ 30 – ( 5 – 1 ) ² ]
b) 2 ³ . 17 – 2 ³ . 14
giúp em với

Comments ( 2 )

  1. $\text{a) 20 – [ 30 – ( 5 – 1 )² ]}$
    $\text{= 20 – [ 30 – 4² ]}$
    $\text{= 20 – [ 30 – 16 ] }$
    $\text{= 20 – 14 }$
    $\text{= 6 }$
    $\text{b) 2³ . 17 – 2³ . 14}$
    $\text{= 2³ . ( 17 – 14 )}$
    $\text{= 8 . 3 }$
    $\text{= 24 }$
    $\text{@chúc bạn học tốt }$

  2. a ) 20 – [ 30 – ( 5 – 1 ) ² ]
      = 20 – [ 30 –  4² ]
      = 20 – [ 30 –  16  ]
      = 20 – 14 
      = 6
    b ) 2³ . 17 – 2³ . 14 
       =  8  . 17 – 8  . 14
       =  8  . ( 17 – 14 ) 
       =  8 . 3
       = 24

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