Question

Tính:

a) \(\dfrac{5}{2}\times\dfrac{4}{3}+\dfrac{1}{3}\)

b) \(\dfrac{7}{3}-\dfrac{2}{3}:\dfrac{5}{7}\)

c) \(\dfrac{3}{4}\times\left(\dfrac{5}{2}-\dfrac{3}{2}\right)\)

Answer 1

a)  $\frac{5}{2} \times \frac{4}{3} + \frac{1}{3} = \frac{{10}}{3} + \frac{1}{3} = \frac{{11}}{3}$

b) $\frac{7}{3} - \frac{2}{3}:\frac{5}{7} = \frac{7}{3} - \frac{2}{3} \times \frac{7}{5} = \frac{7}{3} - \frac{{14}}{{15}} = \frac{{35}}{{15}} - \frac{{14}}{{15}} = \frac{{21}}{{15}} = \frac{7}{5}$

c)  $\frac{3}{4} \times \left( {\frac{5}{2} - \frac{3}{2}} \right) = \frac{3}{4} \times 1 = \frac{3}{4}$