Question

Frações:

a) -8/5 + 1/25 + 3/150 =

b) -13/75 + 8/15 - 6/5 + 1/3 =

c) 12/7 + 4/14 - 10/49 + 1/2 =

d) -74/18 + 6/8 - 1/2 + 4/62 =

Answer 1

a-

$- \frac{8}{5} + \frac{1}{25} + \frac{3}{150} = - \frac{77}{50} = - 1.54$

b-

$- \frac{13}{75} + \frac{8}{15} - \frac{6}{5} + \frac{1}{3} = - \frac{38}{75} = - 0.51$

c-

$\frac{12}{7} + \frac{4}{14} - \frac{10}{49} + \frac{1}{2} = \frac{225}{98} = 2.3$

d-

$- \frac{74}{18} + \frac{6}{8} - \frac{1}{2} + \frac{4}{62} = - \frac{4237}{1116} = - 3.8$

Answer 2

Olá....

a)

- 8/5 + 1/25 + 3/150

- 8/5 + 1/25 + 1/50 ⇒mmc de (5,25,50) = 50

- 80 + 2 + 1/50

- 77/50

b)

- 13/75 + 8/15 - 6/5 + 1/3 ⇒mmc de (75,15,5,3) = 75

- 13 + 40 - 90 + 25/75

- 38/75

c)

12/7 + 4/14 - 10/49 + 1/2

12/7 + 2/7 - 10/49 + 1/2

12 + 2/7 - 10/49 + 1/2

14/7 - 10/49 + 1/2

2 - 10/49 + 1/2⇒mmc de (1,49,2) = 98

196 - 20 + 49/98

225/98

d)

- 74/18 + 6/8 - 1/2 + 4/62

-37/9 + 3/4 - 1/2 + 2/31⇒mmc de (9,4,2,31) = 1116

-4588 + 837 - 558 + 72/1116

- 4237/1116

Espero ter ajudado.