Question

calcule a soma entre o dobro de 3/5 e o triplo de 16/9

Answer 1

$2( \frac{3}{5} ) + 3( \frac{16}{9}) = \\ \frac{6}{5} + \frac{48}{9} =$

m.m.c (5,9)
5, 9 | 3
5, 3 | 3
5, 1 | 5
1, 1  m.m.c. = 3 . 3 . 5 = 45

$\frac{54 + 240}{45} = \\ \frac{294}{45} (\div 3) = \frac{98}{15}$

Answer 2

6/5+16/3
18/15+80/15= 98/15