Question

RESOLVA AS ADIÇÕES E SUBTRAÇÕES DAS FRAÇÕES ABAIXO:

A- 3/7 + 2/7=
B- 5/6 + 2/6=
C- 2/8 + 3/8 + 4/8 =
D- 3/7 + 1/2=
E- 4/6 + 2/4=

Answer 1

Resolução!

A = 3/7 + 2/7

A = 5/7

B = 5/6 + 2/6

B = 7/6

C = 2/8 + 3/8 + 4/8

C = 9/8

D = 3/7 + 1/2 ____ MMC = 14

D = 6 + 7/14

D = 13/14

E = 4/6 + 2/4 ____ MMC = 12

E = 8 + 6/12

E = 14/12 ÷ 2

E = 7/6

Espero ter ajudado

Answer 2

$a) \: \frac{3}{7} + \frac{2}{7} = \frac{5}{7}$

$b) \: \frac{5}{6} + \frac{2}{6} = \frac{7}{6}$

$c) \: \frac{2}{8} + \frac{3}{8} + \frac{4}{8} = \frac{9}{8}$

$d) \: \frac{3}{7} + \frac{1}{2} > mmc = 14 \\ \\ \frac{6}{14} + \frac{7}{14} = \frac{13}{14}$

$e) \: \frac{4}{6} + \frac{2}{4} > mmc = 12 \\ \\ \frac{8}{12} + \frac{6}{12} = \frac{14 {}^{ \div 2} }{12 {}^{ \div 2} } = \frac{7}{6}$