2/3-1/2+(-5/7) = ?
2/3-1/2 (find commum denominators) -> 4/6-3/6 = 1/6 + (-5/7) (find the commum denominators again) -> 7/42 - 30/42 = -23/42
:)
Simplify the following:
2/3-1/2-5/7
Put 2/3-1/2-5/7 over the common denominator 42. 2/3-1/2-5/7 = (14×2)/42-(21)/42+(6 (-5))/42:
(14×2)/42-(21)/42+(6 (-5))/42
14×2 = 28:
28/42-(21)/42+(6 (-5))/42
6 (-5) = -30:
28/42-(21)/42+-30/42
28/42-21/42-30/42 = (28-21-30)/42:
(28-21-30)/42
28-21-30 = 28-(21+30):
28-(21+30)/42
| 3 | 0
+ | 2 | 1
| 5 | 1:
(28-51)/42
28-51 = -(51-28):
-(51-28)/42
| 4 | 11
| 5 | 1
- | 2 | 8
| 2 | 3:
Answer: | (-23)/42
