Question

Va rog, ajutati-mă, pleeeeeeeeeeeeeeeeeeeeease
Dau coroană ​

Answer 1

3. 13/2 + 3/11 = 13x11/2x11 + 3x2/11x2 = 143/22 + 6/22 = 149/22

5. 8/7 - 3/8 = 8x8/7x8 - 3x7/8x7 = 64/56 - 21/56 = 43/56

6. 11/5 - 9/35 = 11x7/5x7 - 9/35 = 77/35 - 9/35 = 68/35

7. 9/3 - 8/7 = 9x7/3x7 - 8x3/7x3 = 63/21 - 24/21 = 39/21

8. 10/6 - 4/8 = 10x4/6x4 - 4x3/8x3 = 40/24 - 12/24 = 28/24

9. 5/6 + 1/21 = 5x7/6x7 + 1x2/21x2 = 35/42 + 2/42 = 37/42

10. 1/15 + 3/10 = 1x2/15x2 + 3x3/10x3 = 2/30 + 9/30 = 11/30

/ este linia de fractie si x este ori

sper ca e bine =)