Advertisements
Advertisements
Question
Evaluate:
`5/21 - (-13)/42`
Sum
Advertisements
Solution
| 2 | 21, 42 |
| 3 | 21, 21 |
| 7 | 7, 7 |
| 1, 1 |
LCM of 21, 42 = 2 x 3 x 7 = 42
`= (5xx2)/(21xx2) - (-13xx1)/(42xx1)`
LCM of 21 and 42 = 42)
`= (10+13)/42 = 23/42`
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find `5/63 - ((-6)/21)`.
Find `(-3)/8 - 7/11`.
Find `-2 1/9 - 6`.
Evaluate:
`(-4)/9 - 2/(-3)`
The sum of two rational numbers is `9/20`. If one of them is `2/5`, find the other.
What should be added to -2 to get `3/8`?
Which rational number should be added to `(-5)/9` to get `(-2)/3`?
Subtract : `(-8)/44` from `(-17)/11`
`(-2)/9 - 7/9` = ______.
Taking x = `(-4)/9`, y = `5/12` and z = `7/18`, find the rational number which subtracted from y gives z.
