7 1/10+1 3/10=

3 2/7+3/7=

5 4/9+3 2/9=

7/11+11 2/11=

25/7+31/7=

31/29+11/29=

79/13+97/13=

13/9+17/9=

21/31+32/31=

65/53+95/53=

21/10-3/10=

45/22-3/22=

73/25-13/25=

2

Ответы и объяснения

2013-02-02T12:30:14+04:00
2013-02-02T14:54:53+04:00

7 1/10+1 3/10=8 4/10=8 2/5

3 2/7+3/7=  6 5/7

5 4/9+3 2/9=8 6/9=8 2/3

7/11+11 2/11=11 9/11

25/7+31/7= 56/7=8

31/29+11/29=42/29=1 13/29

79/13+97/13= 176/13=13 7/13

13/9+17/9=30/9=3 3/9=3 1/3

21/31+32/31=53/21=2 11/21

65/53+95/53=160/53=3 1/53

21/10-3/10= 18/10= 1 8/10=1 4/5

45/22-3/22=42/22=1 20/22=1 10/11

73/25-13/25=60/25=2 10/25=2 2/5