Question

efetue 3/4.(2/3+8/15)

Answer 1

 

efetue 3/4.(2/3+8/15)

3.(2+  8 )
4  3   15

3.(10+ 8 )
4    15

3. 18  ==> 27
4    5         10

Answer 2

$\frac{3}{4}.( \frac{2}{3}+ \frac{8}{15}) \\ \\ \frac{3}{4}. \frac{2}{3} + \frac{3}{4}. \frac{8}{15} \\ \\ \frac{6}{12} + \frac{24}{60}\to mmc = 60 \\ \\ \frac{30 + 24}{60} = \frac{54}{60} = \boxed{ \frac{9}{10} }$