Question

A)3 × 2/5
B)2 × 3/9
C)4 × 1/8

Answer 1

Resolução:

a)

$3 \cdot \frac{2}{5} = \frac{2}{5} + \frac{2}{5} + \frac{2}{5} = \fbox{\frac{6}{5}}$

b)

$2 \cdot \frac{3}{9} = \frac{3}{9} + \frac{3}{9} = \frac{6^{\div 3}}{9^{\div 3}} = \fbox{\frac{2}{3}}$

c)

$4 \cdot \frac{1}{8} = \frac{1}{8} + \frac{1}{8} + \frac{1}{8} + \frac{1}{8} = \frac{4^{\div 4}}{8^{\div 4}} = \fbox{\frac{1}{2}}$

Answer 2

OI

a) = 3 × 2/5

3/1 × 2/5

6/5

b) 2 × 3/9

2/1 × 3/9

6/9 ÷ 3

2/3

c) 4 × 1/8

4/1 × 1/8

4/8 ÷ 4

1/2

Espero ter ajudado.