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

Toán Lớp 7: ` ( 0,25 + 0,5 + 3/4 ) / ( 0,75 + 1/2 ) ` = ` … ? Luư ý : 3/4 = ` 3/4 ` ; 1/2 = ` 1/2 `

Toán Lớp 7: ( 0,25 + 0,5 + 3/4 ) / ( 0,75 + 1/2 )
= … ?
Luư ý : 3/4 = 3/4 ; 1/2 = 1/2

Comments ( 2 )

  1. $\text{- Rút gọn biểu thức:}$
        $\dfrac{0,25+0,5+\dfrac{3}{4}}{0,75+\dfrac{1}{2}}$
    $=\dfrac{\dfrac{1}{4}+\dfrac{1}{2}+\dfrac{3}{4}}{\dfrac{3}{4}+\dfrac{1}{2}}$
    $=\dfrac{\dfrac{1}{4}+\dfrac{2}{4}+\dfrac{3}{4}}{\dfrac{3}{4}+\dfrac{2}{4}}$
    $=\dfrac{\dfrac{6}{4}}{\dfrac{5}{4}}$
    $=\dfrac{6}{4}:\dfrac{5}{4}$
    $=\dfrac{6}{4}.\dfrac{4}{5}$
    $=\dfrac{6}{5}$

  2. ( 0,25 + 0,5 + 3/4 )/( 0,75 + 1/2 )
    = ( 1/4 + 1/2 + 3/4 )/( 3/4 + 1/2 )
    = ( 3/4 + 3/4 )/( 5/4 )
    = ( 3/2 )/( 5/4 )
    = 3/2 : 5/4
    = 6/5
    $☆Jυ丶¢нαи☆$

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