Приведите дроби к одному из знаменателей 10 или 100 и запишите соответствующие десятичные дроби: 1) 1/2 1/4 1/5 1/20 1/25 1/50 2) 3/4 2/5 3/20 2/25 3/50 3) 2.1/2 3.1/4 1.7/20 4.4/25 4) 3/2 9/4 63/20 51/25

1) 1/2 = 5*1/2*5 = 2/10 = 0,5;

1/4 = 1*25/4*24 = 25/100 = 0,25;

1/5 = 2*1/2*5 = 2/10 = 0,2;

1/20 = 1*5/20*5 = 5/100 = 0,05;

1/25 = 1*4/25*4 = 4/100 = 0,04;

1/50 = 2*1/50*2 = 2/100 = 0,02

2) 3/4 = 3*25/4*25 = 75/100 = 0,75;

2/5 = 2*2/5*2 = 4/10 = 0,4;

3/20 = 3*5/20*5 = 15/100 = 0,15;

2/25 = 2*4/25*4 = 8/100 = 0,08;

3/50 = 3*2/50*2 = 6/100 = 0,06;

3) 2.1/2 = 21/10/2 = 21/20 = 21*5/20*5 = 105/100 = 1,05;

3.1/4 = 31/10/4 = 31/40 = 31*5/40*5 = 155/200 = 77,5 / 100 = 0,775;

1.7/20 = 17/10/20 = 17/200 = 8,5/100 = 0,085;

4.4/25 = 44/10/25 = 44/250 = 1,76/10 = 0,176;

4) 3/2 = 3*5/2*5 = 15/10 = 1,5;

9/4 = 9*25/4*25 = 225/100 = 2,25;

63/20 = 63*5/20*5 = 315/100 = 3,15;

51/25 = 51*4/25*4 = 204/100 = 2,04;