Question

1/2-1/7. 2/3-1/4. 5/4-1/2. 5/6-1/3. 7/2-1/5 1-2/5. 2/5-1/2. 11/4-3/2. 7/6-3/4. 11/12-5/18. 13/20-7/30. 37/45-17/30. va roooooog coroanaa

Answer 1

Trebuie sa aduci la numitorul comun pentru toate :
1)1/2 - 1/7 = (7-2)/14= 5/14

2)2/3 - 1/4 = (8-3)/12 = 5/12

3)5/4 - 1/2 = (5-2)/4 = 3/4

4)5/6 - 1/3 = (5-2)/6 = 3/6 = 1/2

5)7/2 - 1/5 = (35-2)/10 = 33/10

6)1 - 2/5 = (5-2)/5 = 3/5

7)2/5 - 1/2 = (4-5)/10 = -1/10

8)11/4 - 3/2 = (11-6)/4 = 5/4

9)7/6 - 3/4 = (14-9)/12 = 5/12

10)11/12 - 5/18 = (198-55)/198 = 143/198

11) 13/20 - 7/30 = (39-14)/60 = 25/60 = 5/12

12) 37/45 - 17/30 = (74-51)/90 = 23/90
 
 

Answer 2

a) 7-2 totu supra 14=5/14,  b) 8-3 t.su.12=5/12, c)5-2 t.s.4=3/4, d) 5-2 t.su.6=3/6=1/2, d) 5-2 t.s.5=3/5, e) 4-5 t.s.10=-1/10, f) 11-6 t.s.4=5/4, g) 14-9 t.s.12=5/12, h) 33-10 t.s. 36=23/36, j) 39-14 t.s. 60=25/60=5/12, l) 74-51 t.s.90=23/90......sp.aj.