Question

Resolva:

a)1/3 - 4/5=

b) 1/3 + 3/2=

c) 2/3 - 7/3=

d) 23/9 + 30/3=

e) 1/2 × 4/5=

f) (-4/7) × (-7/9)=

g) (-3/6) × 9/2=

h) 5/6 ÷ 4/5=

i) (-5/2) ÷ (-1/2)=

j) 20/3 ÷ 2/3


(Se possível me explicar como que se faz essa questão twt agradeço desde já) ​

Answer 1

a) 1/3 - 4/5

1×5-4×3/3×5

5-12/15

- 7/15

b) 1/3 + 3/2

1×2+3×3/3×2

2+9/6

11/6

c) 2/3 - 7/3

2-7/3

- 5/3

d) 23/9 + 30/3

23/9 + 10

23+90/9

113/9

e) 1/2 × 4/5

2/5

f) (-4/7) × (-7/9)

4 × 1/9

4/9

g) (-3/6) × 9/2

- 1/2 × 9/2

- 1×9/2×2

- 9/4

h) 5/6 ÷ 4/5

5/6 × 5/4

25/24

i) (-5/2) ÷ (-1/2)

5/2 × 2

5

j) 20/3 ÷ 2/3

20/3 × 3/2

20 × 1/2

10