Question

URGENTE VALENDO 15 PNTS

Encontre o valor de a + b

A= (-3/16) . (- 4/3) B= (-7/10) . 5/7

a) 0
b) -1/4
c) 1/4
d) 3/4
e) -3/4

pfvvv

Answer 1

Oie, Td Bom?!

>>> A resposta correta seria a letra B.

a + b

>>> Substitua: a = (- 3/16) × (- 4/3) e b = (- 7/10) × 5/7.

(- 3/16) × (- 4/3) + (- 7/10) × 5/7

3/16 × 4/3 - 7/10 × 5/7

3÷3/16 × 4/3÷3 - 7/10 × 5/7

1/16 × 4 - 7/10 × 5/7

1/16÷4 × 4÷4 - 7/10 × 5/7

1/4 - 7/10 × 5/7

1/4 - 7÷7/10 × 5/7÷7

1/4 - 1/10 × 5

1/4 - 1/10÷5 × 5÷5

1/4 - 1/2

• MMC 4 dosdenominadores.

1-2/4

-1/4

- 1/4

Att. Makaveli1996