From 5th grade on all the way through school.
When you are adding or subtracting fractions.
Use the LCM when you are adding and subtracting unlike fractions. Use the GCF when you are simplifying fractions.
The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.
To help with adding and subtracting fractions.
Finding the LCM will make adding and subtracting fractions easier.
Mostly geometry, adding, subtracting fractions and decimals.
For adding and subtracting fractions with different denominators and reducing them to their lowest terms.
When adding or subtracting unlike fractions, the LCM process is used to find the least common denominator.
When adding or subtracting fractions with different denominators then their LCD must be found in order to carry out the calculations.
You would use it when adding fractions.
When adding or subtracting unlike fractions, the LCM process is used to find the least common denominator.
Adding or subtracting fractions requires the use of a common multiple. It is rare that the LEAST common multiple is required - it is useful to keep the numbers small and manageable.