1. Adding/Subtracting Fractions - we need a _______________

Question

2. Adding/Subtracting expressions - we need
______________
3.Adding/Subtracting in SN - we need
______________

Answer 1

1. common denominator
2. like terms
3. signed numbers

Answer 2

are you sure?

Answer 3

I apologize for the confusion. Let me correct that:

1. Adding/Subtracting Fractions - we need a common denominator
2. Adding/Subtracting expressions - we need like terms
3. Adding/Subtracting in SN - we need to apply the rules for adding/subtracting signed numbers