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

Toán Lớp 6: (2 và 1/3+ 3 và1/2) nhân 0,2+ 25%

Toán Lớp 6: (2 và 1/3+ 3 và1/2) nhân 0,2+ 25%

Comments ( 2 )

  1. $\text{Giải đáp:}$ 
    $(2\dfrac{1}{3}+3\dfrac{1}{2})×0,2+25%$
    $=(\dfrac{7}{3}+\dfrac{7}{2})×\dfrac{1}{5}+\dfrac{1}{4}$
    $=\dfrac{7×2+7×3}{6}×\dfrac{1}{5}+\dfrac{1}{4}$
    $=\dfrac{35}{6}×\dfrac{1}{5}+\dfrac{1}{4}$
    $=\dfrac{7}{6}+\dfrac{1}{4}$
    $=\dfrac{7×2+3}{12}$
    $=\dfrac{17}{12}$
     
     

  2. ( 2 1/3 + 3 1/2) . 0,2 + 25%
    = ( 7/3 + 7/2) . 1/5 + 1/4
    = (14/6 + 21/6) . 1/5 + 1/4
    = 35/6 . 1/5 + 1/4
    = 7/6 + 1/4
    =  28/24 + 6/24
    = 17/12

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

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