Question

Faça as operações com as frações a seguir: - 3/8 + 2= 3 3/4 - 4= - 4/3 - 2/6= -5/2-2+-7/6=

Answer 1

Resposta:

-3/8 + 2=13/8

33/4 - 4=17/4

- 4/3 - 2/6= -5/3

-5/2-2+(-7/6)= -17/3

Explicação passo-a-passo:

-3/8 + 2=

MMC(2,8)

2, 8 | 2

1, 4 | 2

1, 2 | 2

1, 1 | 1

MMC = 2 . 2 . 2 = 8

-3/8 + 2=(-3+16)/8=13/8

33/4 - 4= (33-16)/4=17/4

- 4/3 - 2/6=

MMC(3,6)

3, 6 | 2

3, 3 | 3

1, 1 | 1

MMC = 2 . 3 = 6

- 4/3 - 2/6= -(8+2)/6= -10÷2/6÷2= -5/3

-5/2-2+-7/6=

MMC(2,6)

2, 6 | 2

1, 3 | 3

1, 1 | 1

MMC = 2 . 3 = 6

-5/2-2+-7/6=-5/2-2-7/6=(-15-12-7)/6= -34/6= -34÷2/6÷2= -17/3

Answer 2

Oie, Td Bom?!

1.

= - 3/8 + 2

= - 3/8 + 2/1

= - 3/8 + [2 . 8]/[1 . 8]

= - 3/8 + 16/8

= [- 3 + 16]/8

= 13/8

2.

= 33/4 - 4

= 33/4 - 4/1

= 33/4 - [4 . 4]/[1 . 4]

= 33/4 - 16/4

= [33 - 16]/4

= 17/4

3.

= - 4/3 - 2/6

= - 4/3 - [2 ÷ 2]/[6 ÷ 2]

= - 4/3 - 1/3

= [- 4 - 1]/3

= - 5/3

4.

= - 5/2 - 2 + (- 7/6)

= - 5/2 - 2 - 7/6

= - (5/2 + 2 + 7/6)

= - ([5 . 3]/[2 . 3] + 2/1 + 7/6)

= - (15/6 + [2 . 6]/[1 . 6] + 7/6

= - (15/6 + 12/6 + 7/6)

= - [15 + 12 + 7]/6

= - [27 + 7]/6

= - 34/6

= - [34 ÷ 2]/[6 ÷ 2]

= - 17/3

Att. Makaveli1996