Question

Va rog frumos am nevoie de ajutor urgen!!!!
Doar cele care sunt incercuite

Answer 1

1=3supra1
2=2supra3
3=3supra0
4=????
5=2supra6
....................................

Answer 2

1)  1/2+3/4-1/5=5/4-1/5=25/20-4/20=21/20 (se aduc la acelasi numitor comun)

2)4/5-3/4+1/2=16/20-15/20=1/20+1/20=11/20

3)1/3+3/2-1/6=11/6-1/6=10/6

4)5/2+3/4-1/12=13/4-1/2=39/12 =13/4

5)1/2-2/5+1/3=1/10+1/3=13/30

6)1-1/2+1/3-1/4+1/5=70+24/120=94/120=47/60

7)1-1/3+1/2-1/5+1/4=29/30+1/4=58/60+15/60=73/60

8)3 si 1/6-2 si 3/4+3 si 1/8=96/24-66/24=30/24+25/5=105/24=35/8

9)4si 1/8-2 si 5/6+4si 1/4=31/24+102/24=133/24

10)3si 1/8+3/20-5si 1/5=131/

11) 5si 1/4-2 si 5/12-2 si 4/5=38/12-4/5=190/60-168/60=22/60=11/30

12) 6si 1/2-4si 1/4+5si 1/8=9/4+41/8=18/8+41/8=59/8

13)5si 2/3-3si 1/4+2si 5/12=29/12+29/12=58/12=29/6