Question

Frações

$a) \frac{1}{2} + \frac{2}{1} =$

$b) \: \frac{1}{4} + \frac{2}{3} =$

$c) \: \frac{5}{7} + \frac{3}{1} =$

$d) \: \frac{4}{3} + \frac{1}{2} + \frac{2}{7}$

$e) \: \frac{3}{5} - \frac{2}{15} + \frac{7}{3} =$

$f) \: \frac{5}{2} - \frac{3}{1} + \frac{7}{10} =$

$g) \frac{3}{10} + \frac{8}{3} + \frac{1}{4} - \frac{5}{3} =$

$h) \: \frac{1}{2} \times \frac{2}{3} + \frac{1}{15 } =$

$i) \: \frac{1}{5} \times \frac{2}{3} + \frac{1}{15} =$

$j ) \: \frac{7}{2} + \frac{10}{3} \times \frac{1}{5} =$

$k) \: \frac{7}{4} \div \frac{1}{20 } =$

$l) \: \frac{8}{3} \\ \: \: \: \: \frac{5}{7}$


$m) \: \frac{1}{20} \div \frac{3}{7} \times \frac{1}{5}$

$n) \: \frac{1}{3} \times \frac{2}{5} \div \frac{1}{4}$

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Answer 1

Vamos lá....

a)

1/2 + 2/1

1 + 4/2

5/2

b)

1/4 + 2/3

3 + 8/12

11/12

c)

5/7 + 3/1

5 + 21/7

26/7

d)

4/3 + 1/2 + 2/7

56 + 21 + 12/42

89/42

e)

3/5 - 2/15 + 7/3

9 - 2 + 35/15

42/15 ÷ 3

14/5

f)

5/2 - 3/1 + 7/ 10

25 - 30 + 7/10

2/10 ÷ 2

1/5

g)

3/10 + 8/3 + 1/4 - 5/3

18 + 160 + 15 - 100/60

93/60 ÷ 3

31/20

h)

1/2 × 2/3 + 1/15

1/3 + 1/15

5 + 1/15

6/15 ÷ 3

2/5

i)

1/5 × 2/3 + 1/15

2/15 + 1/15

2 + 1/15

3/15 ÷ 3

1/5

j)

7/2 + 10/3 × 1/5

7/2 + 10/15

7/2 + 2/3

21 + 4/6

25/6

k)

7/4 ÷ 1/20

7/4 × 20/1

7 × 5

35

l)

8/3 ÷ 5/7

8/3 × 7/5

56/15

m)

1/20 ÷ 3/7 × 1/5

1/20 × 7/3 × 1/5

7/300

n)

1/3 × 2/5 ÷ 1/4

1/3 × 2/5 × 4

8/15

Espero ter ajudado.