Question

Calcule as frações.

4/7 - 1/9

2/3 + 3/5

2/3 x 5/9

3/4 x 1/2

2/3 : 7/8

3/4 : 5/9

Answer 1

$\frac{2}{3} + \frac{3}{5} \\ mmc = 15 \\ 10 + 9 = 19$

$\frac{4}{7} - \frac{1}{9} \\ mmc = 63 \\ 36 - 7 = 29$

$\frac{2}{3} \times \frac{5}{9} = \frac{10}{27}$

$\frac{3}{4} \times \frac{1}{2} = \frac{3}{8}$

$\frac{2}{3} \div \frac{7}{8} = \frac{16 }{21 }$

$\frac{3}{4} \div \frac{5}{9} = \frac{27}{20}$