Question

add the following rational number -5/42 ,-3/7 and 1/-21​

Answer 1

Answer:

15/42

Step-by-step explanation:

1. take the L.C.M of = 42,7,21
2. the L.C.M will be=42
3. Now, firstly * -3 by 6 so that we can get 42 as the LCM
4. secondly multiply,-1 by 2 so it will be = -2
5. now the condition will be as  (-5+18+2)/42
6. so,18+2=20 and -5
7. lastly 20-5=15
8. the answer will be 15/42