Tính rồi rút gọn phân số: a) 3/5 + 6/5 = . . .

12/30

Tính rồi rút gọn phân số:

a) \[\frac{8}{{21}} + \frac{6}{{21}}\] b) \[\frac{9}{{26}} + \frac{{11}}{{26}}\]c) \[\frac{{13}}{{30}} + \frac{7}{{30}}\] d) \[\frac{5}{{12}} + \frac{1}{{12}}\]

e) \[\frac{7}{{16}} - \frac{5}{{16}}\] f) \[\frac{{19}}{{50}} - \frac{9}{{50}}\]g) \[\frac{{19}}{{45}} - \frac{4}{{45}}\] h) \[\frac{{27}}{{30}} - \frac{{12}}{{30}}\]

Nhập câu trả lời ở đây

0/3000 ký tự

Giải thích

a) \[\frac{8}{{21}} + \frac{6}{{21}} = \frac{{14}}{{21}} = \frac{2}{3}\] b) \[\frac{9}{{26}} + \frac{{11}}{{26}} = \frac{{20}}{{26}} = \frac{{10}}{{13}}\]

c) \[\frac{{13}}{{30}} + \frac{7}{{30}} = \frac{{20}}{{30}} = \frac{2}{3}\] d) \[\frac{5}{{12}} + \frac{1}{{12}} = \frac{6}{{12}} = \frac{1}{2}\]

e) \[\frac{7}{{16}} - \frac{5}{{16}} = \frac{2}{{16}} = \frac{1}{8}\] f) \[\frac{{19}}{{50}} - \frac{9}{{50}} = \frac{{10}}{{50}} = \frac{1}{5}\]

g) \[\frac{{19}}{{45}} - \frac{4}{{45}} = \frac{{15}}{{45}} = \frac{1}{3}\] h) \[\frac{{27}}{{30}} - \frac{{12}}{{30}} = \frac{{15}}{{30}} = \frac{1}{2}\]