When you are adding or subtracting fractions.
Any job where you need to add or subtract fractions.
You would use it when adding fractions.
You need at least two numbers to find an LCM no matter what you use.
When you are adding or subtracting fractions.
It doesn't matter which method you use. You still need at least two numbers to find an LCM. There is no LCM of 20.
No matter what method you use, you need at least two numbers to find an LCM.
Avoidance. It is impossible to find the LCM of a single number. You need at least two.
To add and subtract unlike fractions.
If I was trying to find a least common multiple, I would use multiplication.
You need at least two numbers to find an LCM.
You need at least two numbers to find an LCM. And they need to be whole numbers, not decimals.
You need at least two numbers to find an LCM.