Tính: a) 5 /6 + 3/2

7/30

Tính:

a) \[\frac{5}{6} + \frac{3}{2}\] b) \[\frac{9}{5} - \frac{3}{{10}}\]c) \[\frac{5}{9} \times \frac{2}{7}\] d) \[\frac{6}{{11}}:\frac{7}{2}\]

e) \[\frac{8}{9} + \frac{2}{3}\] f) \[\frac{9}{4} - \frac{5}{6}\] g) \[\frac{6}{7} \times \frac{8}{9}\] h) \[\frac{4}{9}:\frac{5}{7}\]

Nhập câu trả lời ở đây

0/3000 ký tự

Giải thích

a) \[\frac{5}{6} + \frac{3}{2} = \frac{5}{6} + \frac{9}{6} = \frac{{14}}{6} = \frac{7}{3}\] b) \[\frac{9}{5} - \frac{3}{{10}} = \frac{{18}}{{10}} - \frac{3}{{10}} = \frac{{16}}{{10}} = \frac{8}{5}\]

c) \[\frac{5}{9} \times \frac{2}{7} = \frac{{10}}{{63}}\] d) \[\frac{6}{{11}}:\frac{7}{2} = \frac{6}{{11}} \times \frac{2}{7} = \frac{{12}}{{77}}\]

e) \[\frac{8}{9} + \frac{2}{3} = \frac{8}{9} + \frac{6}{9} = \frac{{14}}{9}\] f) \[\frac{9}{4} - \frac{5}{6} = \frac{{27}}{{12}} - \frac{{10}}{{12}} = \frac{{17}}{{12}}\]

g) \[\frac{6}{7} \times \frac{8}{9} = \frac{{48}}{{63}} = \frac{{16}}{{21}}\] h) \[\frac{4}{9}:\frac{5}{7} = \frac{4}{9} \times \frac{7}{5} = \frac{{28}}{{45}}\]