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

Toán Lớp 4: tính giá trị biểu thức (1/6+1/10+1/15) :(1/6+1/10-1/15)

Toán Lớp 4: tính giá trị biểu thức (1/6+1/10+1/15) :(1/6+1/10-1/15)

Comments ( 2 )

  1. ( $\dfrac{1}{6}$ + $\dfrac{1}{10}$ + $\dfrac{1}{15}$ ) : ( $\dfrac{1}{6}$ + $\dfrac{1}{10}$ – $\dfrac{1}{15}$ )
    =( $\dfrac{5}{30}$ + $\dfrac{3}{30}$ + $\dfrac{2}{30}$ ) : ( $\dfrac{5}{30}$ + $\dfrac{3}{30}$ – $\dfrac{2}{30}$ ) $\dfrac{1}{15}$ )
    = $\dfrac{10}{30}$ : $\dfrac{6}{30}$
    =$\dfrac{300}{180}$ = $\dfrac{5}{3}$ 
    Xin hay nhất

  2. Giải đáp+Lời giải và giải thích chi tiết:
    (1/6+1/10+1/15) :(1/6+1/10-1/15) 
    =(5/30+3/30+2/30):(5/30+3/30-2/30)
    =10/30:6/30
    =30/18=5/3

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

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