Question

a)2/3+2/5+3/4=

b)1/4+3/5+2/6=

c)2/5+4/3+2/6=

ME AJUDEM POR FAVOR !!!​

Answer 1

Resposta:

a)

$\frac{2}{3} + \frac{2}{5} + \frac{3}{4} = \frac{20 \times 2 + 12 \times 2 + 15 \times 3}{60} = \frac{40 + 24 + 45}{60} = \frac{109}{60}$

b)

$\frac{1}{4} + \frac{3}{5} + \frac{2}{6} = \frac{15 \times 1 + 12 \times 3 + 10 \times 2}{60} = \frac{15 + 36 + 20}{60} = \frac{71}{60}$

c)

$\frac{2}{5} + \frac{4}{3} + \frac{2}{6} = \frac{6 \times 2 + 10 \times 4 + 5 \times 2}{30} = \frac{12 + 40 + 10}{30} = \frac{62}{30} = \frac{31}{15}$

Answer 2

Oi...

Resolução

a)

2/3 + 2/5 + 3/4  ⇒mmc de 3, 5, 4 = 60

40 + 24 + 45/60

109/60

b)

1/4 + 3/5 + 2/6

1/4 + 3/5 + 1/3⇒mmc de 4, 5, 3 = 60

15 + 36 + 20/60

71/60

c)

2/5 + 4/3 + 2/6

2/5 + 4/3 + 1/3

2/5 + 4 + 1/3

2/5 + 5/3⇒mmc de 5, 3 = 15

31/15

Bons estudos.