Tính 5/8+ 13/24

10/13

PHẦN II: TỰ LUẬN.

(2 điểm) Tính

a) \(\frac{5}{8}\)+\(\frac{{13}}{{24}}\)

b) \(\frac{{43}}{{40}}\)–\(\frac{7}{{10}}\)

c) \(\frac{5}{{12}}:\)\(\frac{5}{4}\)

d) \(\frac{{11}}{{12}} \times \frac{2}{5} + \frac{5}{6}\)

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Giải thích

a) \(\frac{5}{8} + \frac{{13}}{{24}} = \frac{{15}}{{24}} + \frac{{13}}{{24}} = \frac{{28}}{{24}} = \frac{7}{6}\)

b) \(\frac{{43}}{{\;40}} - \frac{7}{{10}} = \frac{{43}}{{40}} - \frac{{28}}{{40}} = \frac{{15}}{{40}} = \frac{3}{8}\)

c) \(\frac{5}{{12}}\;:\frac{5}{4} = \frac{5}{{12}} \times \frac{4}{5} = \frac{{20}}{{60}} = \frac{1}{3}\)\(\frac{5}{4}\)

d) \(\frac{{11}}{{12}}\; \times \;\frac{2}{5} + \frac{5}{6} = \frac{{22}}{{60}} + \frac{5}{6} = \frac{{22}}{{60}} + \frac{{50}}{{60}} = \frac{{72}}{{60}} = \frac{6}{5}\)