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\(\frac{3.5.7}{21.10}=\frac{1}{2}\)
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Ai thấy mình đúng thì k nha
\(\dfrac{4}{9}:2=\dfrac{4}{9}.\dfrac{1}{2}=\dfrac{2}{9}\)
\(\dfrac{3}{5}:2=\dfrac{3}{5}.\dfrac{1}{2}=\dfrac{3}{10}\)
\(\dfrac{10}{21}:5=\dfrac{10}{21}.\dfrac{1}{5}=\dfrac{2}{21}\)
\(\dfrac{6}{7}:3=\dfrac{6}{7}.\dfrac{1}{3}=\dfrac{2}{7}\)
a) $\frac{2}{3} - \frac{1}{3} = \frac{{2 - 1}}{3} = \frac{1}{3}$
b) $\frac{7}{{12}} - \frac{5}{{12}} = \frac{{7 - 5}}{{12}} = \frac{2}{{12}} = \frac{1}{6}$
c) $\frac{{17}}{{21}} - \frac{{10}}{{21}} = \frac{{17 - 10}}{{21}} = \frac{7}{{21}} = \frac{1}{3}$
a: 10/3-8/3=2/3
11/4-5/4=6/4=3/2
32/17+21/17=53/17
b: 5/6+7/8=20/24+21/24=41/24
3/7-5/14=6/14-5/14=1/14
7/4-3/5=35/20-12/20=23/20
a: 10/3-8/3=2/3
11/4-5/4=6/4=3/2
32/17+21/17=53/17
b: 5/6+7/8=20/24+21/24=41/24
3/7-5/14=6/14-5/14=1/14
7/4-3/5=35/20-12/20=23/20
\(\dfrac{10}{21}:\dfrac{5}{7}=\dfrac{10}{21}.\dfrac{7}{5}=\dfrac{2}{3}\)
\(\dfrac{10}{21}:\dfrac{5}{7}=\dfrac{10}{21}\times\dfrac{7}{5}=\dfrac{70}{105}\)