Question

Evaluate: `(8/15 xx (-25)/16) + ((-18)/35 xx 5/6)`

Answer 1

`(8/15 xx (-25)/16) + ((-18)/35 xx 5/6)`

`=> (8 xx (-25))/(15 xx 16) + (- 18 xx 5)/(35 xx 6)`

`=> (1 xx (-5))/(3 xx 2) + (-3 xx 1)/(7 xx 1)`

`=> (-5)/6 - 3/7`

2	6, 7
3	3, 7
7	1, 7
	1, 1

 

 

 

 

L.C.M. of 6 and 7 = 2 × 3 × 7 = 42

(∵ L.C.M. of 6 and 7 = 42)

`=> (-5 xx 7)/(6 xx 7) + (3 xx 6)/(7 xx 6)`

`=> (-35 - 18)/42 = (- 53)/42`