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

Toán Lớp 6: 2 x 31 x 12 +4 x 6 x 42 + 8 x 27 x 3

Toán Lớp 6: 2 x 31 x 12 +4 x 6 x 42 + 8 x 27 x 3

Comments ( 2 )

  1.   $ 2$  $ x$ $  31$ $  x $ $ 12$ $  +$ $ 4$ $  x$ $  6$ $  x $ $ 42 $ $ +$  $ 8$  $ x$ $  27$ $  x $ $ 3$ 
    $ =$ $  2$ $  x$ $ 31$ $  x $ $ 3 $ $ x $ $ 4 $ $ +$ $  4$ $  x$ $  2 $ $ x $ $ 3 $ $ + $ $ 2 x$  $ 4 x$ $  3 x $ $ 27$ 
    $ = $ $ 2 $ $ x $ $ 3$ $  x$ $  4 $ $ x $ $ ( 31 $ $ +$ $  42 $ $ +$ $  27 )$ 
    $ =$ $  24$ $  x $ $ 100$ 
    $ = $ $ 2400$ 
    $@Chy$ ~ xin hay nhất
     

  2. 2 x 31 x 12 +4 x 6 x 42 + 8 x 27 x 3
    =2.31.4.3 + 4.2.3.42 + 2.4.3.27
    =2.3.4.(31+42+27)
    =2.3.4.100
    =24.100
    =2400
     

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