Извени но 142и149 номера не видно на фото:
143. 5+4/5=5 4/5
3+2/3=3 2/3
1+5/6=1 5/6
2+4/9=2 4/9
144. 3+1 1/2=4 1/2
4+3 1/4= 7 1/4
1+3 3/7=4 3/7
1+3 1/5= 4 1/5
145. 1 1/3+1/5=1 (5/15+3/15)=1 8/15
5/12+6 1/2=6(5/12+6/12)=6 11/12
2/9+4 1/3= 4 (2/9+3/9)=4 5/9
5 2/5 +3/10=5 (10/10+3/10)= 5 13/10=6 3/10
146. 3 3/5+1 11/15 = 4 (9/15+11 /15 )=4 20/15=
=5 5/15=5 1/3
5 7/12+3 1/4= 8 (7/12+3/12)=8 15/12=
=9 3/12=9 1/4
2 7/18+ 5 1/12=7 (14/36+3/36)=7 17/36
5 1/3 + 6 5/6= 11 (2/6+5/6)=11 7/6=12 1/6
147. 9 1/6+12 1/2= 21 (1/6+3/6)=21 4/6=21 2/3
3 7/15 +8 3/4= 11 (28/60+45/60)= 11 73/60
= 12 13/60
7 1/3 +2 4/27= 9 (9/27+4/27)=9 13/27
3 11/18 +18 1/24 = 21 (44/72+3/72)=
=21 45/72=21 5/8
148. 4 3/4+5 4/5=9 (15/20+16/20)=9 31/20=
=10 11/20
8 8/15 +14 3/10=22 (16/30+9/30)=22 25/30
=22 5/6
1 13/36 +6 3/8= 7 (26/72+27/72)= 7 53/7 2
2 1/2 + 5 4/5=7 (5/10+8/10)=7 13/10=8 3/10