2/7 x 4/3 + 2/7 x 1/3 – 2/7 x 2/3

2 bình luận về “2/7 x 4/3 + 2/7 x 1/3 – 2/7 x 2/3”

1. 2/7 × 4/3 + 2/7 × 1/3 – 2/7 × 2/3

   = 2/7 × ( 4/3 + 1/3 – 2/3 )

   = 2/7 × 3/3

   = 2/7 × 1 = 2/7

    

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2. $\frac{2}{7}$ × $\frac{4}{3}$ + $\frac{2}{7}$ × $\frac{1}{3}$ – $\frac{2}{7}$ $\frac{2}{3}$

   = $\frac{2}{7}$ × ($\frac{4}{3}$ + $\frac{1}{3}$ – $\frac{2}{3}$)

   = $\frac{2}{7}$ × $\frac{4+1-2}{3}$

   = $\frac{2}{7}$ × $\frac{3}{3}$ 

   = $\frac{2}{7}$ × 1

   = $\frac{2}{7}$ 

   Vậy $\frac{2}{7}$ × $\frac{4}{3}$ + $\frac{2}{7}$ × $\frac{1}{3}$ – $\frac{2}{7}$ $\frac{2}{3}$ = $\frac{2}{7}$ 

   #suziezhan

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