\(\frac{2}{5}+1=\frac{2}{5}+\frac{5}{5}=\frac{7}{5}\) ;\(\frac{6}{7}.4=\frac{24}{7}\);\(\frac{3}{7}:2=\frac{3}{7}.\frac{1}{2}=\frac{3}{14}\);\(2:\frac{2}{4}=2.\frac{4}{2}=2.2=4\);\(\frac{3}{4}.4+\frac{1}{3}=\frac{12}{4}+\frac{1}{3}=3+\frac{1}{3}=\frac{10}{3}\);\(\frac{1}{4}:\frac{1}{3}-\frac{1}{2}=\frac{1}{4}.\frac{3}{1}-\frac{1}{2}=\frac{3}{4}-\frac{1}{2}=\frac{1}{4}\)
\(\frac{2}{5}+1=\frac{2}{5}+\frac{5}{5}=\frac{7}{5}\)
\(\frac{6}{7}\times4=\frac{6\times4}{7}=\frac{24}{7}\)
\(\frac{3}{7}\div2=\frac{3}{7}\times\frac{1}{2}=\frac{3\times1}{7\times2}=\frac{3}{14}\)
\(2\div\frac{2}{4}=2\times\frac{4}{2}=2\times2=4\)
\(\frac{3}{4}\times4+\frac{1}{3}=\frac{3\times4}{4}+\frac{1}{3}=3+\frac{1}{3}=\frac{9}{3}+\frac{1}{3}=\frac{10}{3}\)
\(\frac{1}{4}\div\frac{1}{3}-\frac{1}{2}=\frac{1}{4}\times3-\frac{1}{2}=\frac{1\times3}{4}-\frac{1}{2}=\frac{3}{4}-\frac{1}{2}=\frac{3}{4}-\frac{2}{4}=\frac{1}{4}\)
\(\frac{2}{5}\)+ \(1\) = \(\frac{7}{5}\)
\(\frac{6}{7}.4=\frac{24}{7}\)
\(\frac{3}{7}:2=\frac{3}{14}\)
\(2:\frac{2}{4}=4\)
\(\frac{3}{4}x4+\frac{1}{3}=\frac{10}{3}\)
\(\frac{1}{4}:\frac{1}{3}-\frac{1}{2}=\frac{1}{4}\)
2/5 + 1 = 2/5 + 5/5 = 7/5
6/7 x 4 = 6 x 4/ 7 = 24/7
3/7 : 2 = 3/7 x 1/2 = 3/14
2 : 2/4 = 2 x 4/2 = 2 x 4/ 2 = 8/2 = 4
3/4 x 4 + 1/3 = 3/4 x 4/1 + 1/3 = 12/4 + 1/3 = 36/12 + 4/12 = 40/12 = 10/3
1/4 : 1/3 - 1/2 = 1/4 x 3/1 - 1/2 = 3/4 - 1/2 = 3/4 -2/4 = 1/4
Hok tốt nha
\(\frac{2}{5}+1=\frac{2}{5}+\frac{5}{5}=\frac{7}{5}\)
\(\frac{6}{7}\times4=\frac{6\times4}{7}=\frac{24}{7}\)
\(\frac{3}{7}:2=\frac{3}{7}\times\frac{1}{2}=\frac{3}{14}\)
\(2:\frac{2}{4}=2\times\frac{4}{2}=4\)
\(\frac{3}{4}\times4+\frac{1}{3}=3+\frac{1}{3}=\frac{9}{3}+\frac{1}{3}=\frac{10}{3}\)
\(\frac{1}{4}:\frac{1}{3}-\frac{1}{2}=\frac{1}{4}\times3-\frac{1}{2}=\frac{3}{4}-\frac{2}{4}=\frac{1}{4}\)
