Question

Agora efetue no caderno
A) 2/ 3+
3 /4
B) 5/6+
7/4
C) 3/4+
2/12+
4/8
D) 4/9+
2/3+
3/12+
E)6/5+
5/15
F) 9/12+
7/24

Answer 1

Olha e fácil conta por exemplo 2+3 =5
3+4=7
5/7

Deu pra ter noção do que fazer né?

Answer 2

Resposta:

$A)\\ \\ \frac{2}{3}+ \frac{3}{4} \\ \\ mmc=12\\ \\ \frac{8+9}{12} =\frac{17}{12} \\ \\ \\ B)\\ \\\frac{5}{6} +\frac{7}{4} \\ \\ mmc=12\\ \\ \frac{10+21}{12} =\frac{31}{12}$

$C)\\ \\ \frac{3}{4}+ \frac{2}{12}+ \frac{4}{8} \\ \\ simplifique\\ \\ \frac{3}{4}+ \frac{1}{6}+ \frac{1}{2} \\ \\ mmc=12\\ \\ \frac{9+2+6}{12} =\frac{17}{12} \\ \\ \\ D)\\ \\ \frac{4}{9}+ \frac{2}{3}+ \frac{3}{12} \\ \\ simplifique\\ \\ \frac{4}{9}+ \frac{2}{3} +\frac{1}{4} \\ \\ mmc=36\\ \\ \frac{16+24+9}{36} =\frac{49}{36}$

$E)\\ \\ \frac{6}{5}+ \frac{5}{15} \\ \\ simplifique\\ \\ \frac{6}{5} +\frac{1}{3} \\ \\ mmc=15\\ \\ \frac{18+5}{15} =\frac{23}{15}$

$F)\\ \\ \frac{9}{12} +\frac{7}{24}\\ \\ simplifique\\ \\ \frac{3}{4}+ \frac{7}{24} \\ \\ mmc=24\\ \\ \frac{18+7}{24} =\frac{25}{24}$