Toán Lớp 6: $\frac{2}{3}$ – $\frac{3}{5}$ + $\frac{5}{10}$ : $\frac{2}{8}$
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Toán Lớp 6: $\frac{2}{3}$ – $\frac{3}{5}$ + $\frac{5}{10}$ : $\frac{2}{8}$
Comments ( 2 )
Giải đáp:
$\dfrac{2}{3}-\dfrac{3}{5}+\dfrac{5}{10}:\dfrac{2}{8}$
$= (\dfrac{10}{15}- \dfrac{9}{15})+(\dfrac{1}{2}.\dfrac{4}{1})$
$= \dfrac{1}{15}+\dfrac{2}{1}$
$= \dfrac{1}{15}+\dfrac{30}{15}$
$= \dfrac{31}{15}$
2/3 – 3/5 + 5/10 : 2/8
= 10/15 – 9/15 + 1/2. 4
= 1/15 + 2
= 31/15