Advertisements
Advertisements
Question
Add, the pair of rational numbers, given below, and show that their addition (sum) is also a rational number
`5/(-26) "and" 8/39`
Advertisements
Solution
`5/(-26) + 8/39`
`= (-5xx3)/(26xx3) + (8xx2)/(39xx2)`
| 2 | 26, 39 |
| 3 | 13, 39 |
| 13 | 13, 13 |
| 1, 1 |
`therefore` LCM of 26 and 39 = 2 x 3 x 13 = 78
`= (-15 + 16)/78` (LCM of 26 and 39 = 78)
`= 1/78`
Which is a rational number.
APPEARS IN
RELATED QUESTIONS
Add, the pair of rational numbers, given below, and show that their addition (sum) is also a rational number.
`5/(-6) "and" 2/3`
Write the Additive Inverse(Negative) of : `(-3)/1`
Fill in the blank:
Additive inverse of `(-5)/(-12)`= --------
Evaluate:
`(2/(-3) xx 5/4) + (5/9 xx 3/(-10))`
Multiply the following rational number.
`(-8)/9 xx 3/4`
Write the multiplicative inverse.
`(-3)/8`
Write the multiplicative inverse.
7
Carry out the division of a rational number.
`(-10)/11 div (-11)/10`
Solve:
`3 2/5 - 2 1/4`
Taking x = `(-4)/9`, y = `5/12` and z = `7/18`, find the rational number which when added to x gives y.
