Advertisements
Advertisements
Question
Evaluate: `(7/8 xx 24/21) + ((-5)/9 xx 6/-25)`
Sum
Advertisements
Solution
`(7/8 xx 24/21) + ((-5)/9 xx 6/-25)`
`=> (7 xx 24)/(8 xx 21) + (- 5 xx 6)/(9 xx (-25))`
`=> (1 xx 3)/(1 xx 3) + (1 xx 2)/(3 xx 5)`
`=> 3/3 + 2/15`
| 3 | 3, 15 |
| 5 | 1, 5 |
| 1, 1 |
(∵ L.C.M. of 3 and 15 = 15)
`=> (3 xx 5)/(3 xx 5) + (2 xx 1)/(15 xx 1)`
`=> (15 + 2)/15 = 17/15 = 1 2/15`
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: `7/-4 = "x"/8`
Express the following rational numbers to the lowest terms: `(-48)/-72`
Compare: `(- 3)/8 and 2/5`
Arrange the given rational numbers in descending order:
`5/8, 13/-16 "and" (-7)/12`
Add: `-3 "and" 2/3 `
Add: `(-5)/9 "and" 7/18`
Subtract:
`(- 6)/25 "from" (-8)/5`
Subtract: `(- 7)/4 "from" -2`
Multiply: `2 1/14 "and" -7`
Divide: `35 "by" (- 7)/9`
