А) 3/20 ; б) 5/10 ; в) 4/25; г) 2/5; д) 3/4 ; е) 7/50; Задание : Приведи дробь к знаменателю 100

Приведем дроби к знаменателю 100:

1) 3/20 = 15/100;

100 : 20 = 5;

3/20 * 5/5 = (3 * 5)/(20 * 5) = 15/100.

2) 5/10 = 50/100;

100 : 10 = 10;

5/10 * 10/10 = (5 * 10)/(10 * 10) = 50/100.

3) 4/25 = 16/100;

100 : 25 = 4;

4/25 * 4/4 = (4 * 4)/(25 * 4) = 16/100.

4) 2/5 = 40/100;

100 : 5 = 20;

2/5 * 20/20 = (2 * 20)/(5 * 20) = 40/100.

5) 3/4 = 75/100;

100 : 4 = 25;

3/4 * 25/25 = (3 * 25)/(4 * 25) = 75/100.

6) 7/50 = 14/100;

100 : 50 = 2;

7/50 * 2/2 = (7 * 2)/(50 * 2) = 14/100.