Question

using properties of rational number



what should be added to 1/2 + 1/3 - 1/5 to get 4​

Answer 1

Answer:

120/19

Step-by-step explanation:

1/2+1/3-1/5=4

now doing same the denominator by LCM

15+10-6/30=4

19/30=4

=4×30/19

=120/19

Answer 2

Answer:

Given ((1/2) + (1/3) + (1/5)) Let the required number be x ((1/2) + (1/3) + (1/5)) + x = 3 x = 3 – ((1/2) + (1/3) + (1/5)) LCM of 2, 3 and 5 is 30 Consider (1/2) = (1/2) × (15/15) = (15/30) (1/3) = (1/3) × (10/10) = (10/30) (1/5) = (1/5) × (6/6) = (6/30) On substituting x = 3 – ((15/30) + (10/30) + (6/30)) x = 3 – (31/30) (3/1) = (3/1) × (30/30) = (90/30) x = (90/30) – (31/30) x = (90 – 31)/30 x = (59/30)Read more on Sarthaks.com - https://www.sarthaks.com/682271/what-should-be-added-to-1-2-1-3-1-5-to-get-3?show=682272#a682272