Question

para dividir uma fração por outra basta multiplicar a primeira pelo inverso da segunda.

observe os exemplos e resolva:

3/4 ÷ 5/7 = 3/4 × 7/5 = 21/20 ← exemplo.

questões:

3/9 ÷ 4/8 = ?

6/7 ÷ 5/3 = ?

2/5 ÷ 8/19 = ?

2/4 ÷ 3/7 = ?

3/8 ÷ 4/16 = ?

5/7 ÷ 9/3 = ?

Answer 1

3/9 ÷ 4/8
3/9 × 8/4 = 24/36 = 2/3

6/7 ÷ 5/3
6/7 × 3/5 = 18/35

2/5 ÷ 8/19
2/5 × 19/8 = 38/40 = 19/20

2/4 ÷ 3/7
2/4 × 7/3 = 14/12 = 7/6

3/8 ÷ 4/16
3/8 ÷ 1/4
3/8 × 4/1 = 12/8 = 3/2

5/7 ÷ 9/3
5/7 ÷ 3/1
5/7 × 1/3 = 5/21