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

Toán Lớp 6: Tính hợp lí 25.6 + 5.5.29 – 45.5

Toán Lớp 6: Tính hợp lí
25.6 + 5.5.29 – 45.5

Comments ( 2 )

  1. 25.6 + 5.5.29 – 45.5
    = 25 . 6 + 25 . 29 – 5 . 5 .  9
    = 25 . 6 + 25 . 29 – 25.  9
    = 25 . (6 + 29 – 9)
    = 25 . 26
    = 650
     

  2. $\text{ 25 . 6  + 5 . 5 . 29 – 45 . 5 }$
    $\text{= 25 . 6 + 25 . 29 – 5 . 9 . 5}$
    $\text{= 25 . 6 + 25 . 29 – 25 . 9 }$
    $\text{= 25 . ( 6 + 29 – 9 ) }$
    $\text{= 25 . 26 }$
    $\text{= 650 }$

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

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