Question

3- Resolva os cálculos abaixo: a) – 5/8 + 3/8 = b) + 2/4 + 3/4 = c) - 8/9 - 1/9 = d) - 9/10 + 8/10 = e) - 5/8 + 5/6 = f) - 1/12 + 3/10 = g) - 5/6 -3/4 = --- Carla controla am desnesas​

Answer 1

Resposta:

Explicação passo a passo:

3- Resolva os cálculos abaixo:

a) – 5/8 + 3/8

= -2/8 (:2)/(:2)

R.: = - 1/4

b) + 2/4 + 3/4

R.: = 5/4

c) - 8/9 - 1/9

R.: = 7/9

d) - 9/10 + 8/10

R.: = -1/10

e) - 5/8 + 5/6

= [3.(-5)+4.5]/24

= (-15+20)/24

R.: = 5/24

_____________

Mmc= (8,6)=24

8,6:2

4,3:2

2,3:2

1,3:3

1,1

= 2.2.2.3

= 8.3

= 24

f) - 1/12 + 3/10 =

(-5+6.3)/60= (-5+18)/60

R.: = 13/60

--------------

Mmc= 60

12,10:2

6,5: 2

3,5: 3

1,5:5

1,1

=2.2.3.5

= 4.15

= 60

g) - 5/6 -3/4

= [2.(-5) - 3.3]/12

= (-10-9)/12

R.: = -19/12

___________

6,4:2

3,2:2

3,1:3

1,1

= 2.2.3

= 12

Answer 2

Resposta:

$- 5/8 + 3/8 \\\\\frac{-5}{8}+3/8\\\\\frac{-5}{8}+\frac{3}{8}\\\\-\frac{1}{4}$

$+ 2/4 + 3/4\\\\\frac{2}{4}+3/4\\\\\frac{2}{4}+\frac{3}{4}\\\\\frac{5}{4}\\\\1\frac{1}{4}$

$- 8/9 - 1/9\\\\\frac{-8}{9}-1/9\\\\\frac{-8}{9}-\frac{1}{9}\\\\-1$

$- 9/10 + 8/10\\\\\frac{-8}{9}-1/9\\\\\frac{-8}{9}-\frac{1}{9}\\\\-1$

$- 5/8 + 5/6\\\\\frac{-5}{8}+5/6\\\\\frac{-5}{8}+\frac{5}{6}\\\\\frac{5}{24}$

$- 1/12 + 3/10\\\\\frac{-1}{12}+3/10\\\\\frac{-1}{12}+\frac{3}{10}\\\\\frac{13}{60}$

$- 5/6 -3/4\\\\\frac{-5}{6}-3/4\\\\\frac{-5}{6}-\frac{3}{4}\\\\-\frac{19}{12}$