Advertisements
Advertisements
Question
Evaluate: `- 5/7 - (- 3/8)`
Sum
Advertisements
Solution
`- 5/7 - (- 3/8)`
`- 5/7 + 3/8`
| 2 | 7, 8 |
| 2 | 7, 4 |
| 2 | 7, 2 |
| 7 | 7, 1 |
| 1 |
L.C.M. of 7 and 8 = 2 × 2 × 2 × 7 = 56
`=> (-5 xx 8)/(7 xx 8) + (3 xx 7)/(8 xx 7)`
(∵ L.C.M. of 7 and 8 = 56)
`= (-40 + 21)/56 = (-19)/56`
shaalaa.com
Concept for Problem Solving Using Operations on Rational Numbers
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find x, such that: `3/7 = "x"/-35`
Add: `4/-15 "and" (-7)/-15`
Add: `(-7)/25 "and" 9/-25`
Subtract : `(-6)/11 "from" (-3)/(-11)`
Evaluate: `((-12)/5) xx (10/-3)`
Evaluate: `3 1/8 xx (-2 2/5)`
Multiply: ` 35 "and" (-18)/25`
Find the cost of `3 1/2` m cloth, if one metre cloth costs ₹325 `1/2`.
Evaluate: `((-5)/9 xx 6/-25) + (24/21 xx 7/8)`
Evaluate: `(3 5/12 + 1 2/3) div (3 5/12 - 1 2/3)`
