Кобщему знаменателю. решить. 1) 1/15 и 1/5; 7/16 и 3/8; 11/14 и 13/140; 15/16 и23/192; 2) 7/10 и 2/9; 13/15 и7/8; 3/10 и 17/9; 7/13 и 8/15; 3) 1/4 и 1/3; 2/3 и 3/4; 1/2 и 3/7; 3/5 и 5/6; 7/10 и 2/9; 4) 1/12 и 1/7; 7/15 и 3/4; 5/11 и 2/13; 6/17 и3/10; 4/15 и7/11; 5) 1/2 *1/3 и 1/5; 2/3*4/5 и3/4; 1/3*1/5 и 4/7; 6) 7/10*2/3 и 10/11; 3/4*5/9 и 3/7; 4/5*5/7 и 7/9;

1.
1/5=3/15

3/8=6/16

11/14=110/140

15/16=180/192

2.
7/10=63/90
2/9=20/90

13/15=104/120
7/8=105/120

3/10=27/90
17/9=170/90

7/13=105/195
8/15=104/195

3.
1/4=3/12
1/3=4/12

2/3=8/12
3/4=9/12

1/2=7/14
3/7=6/14

3/5=18/30
5/6=25/30

7/10=63/90
2/9=20/90

4.
1/12=7/84
1/7=12/84

7/15=28/60
3/4=45/60

5/11=65/143
2/13=22/143

6/17=60/170
3/10=51/170

4/15=44/165
7/11=105/165

5.
1/2=15/30
1/3=10/30
1/5=6/30

2/3=40/60
4/5=48/60
3/4=45/60

1/3=35/105
1/5=21/105
4/7=60/106

6.
7/10=231/330
2/3=220/330
10/11=300/330

3/4=189/252
5/9=140/252
3/7=108/252

4/5=252/315
5/7=225/315
7/9=245/315