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Least Common Multiple (Compare, Add, and Subtract Fractions)
#1 Divisible? If so, the LCM is the larger
of the 2 numbers.
#4 Ladder Method – pull out all prime
numbers starting with 2. Once you exhaust
a number, move to the next prime number.
#2 Listing multiples
#5 Euclid’s Method
#3 Prime factorization (factor trees) – be
sure to write in exponential notation!
#6 Calculator (TI-34 II)
- 2nd key, math (yellow)
- Scroll over until you see “lcm” & hit
enter key
- Type in 1st number
- 2nd key, comma key (yellow)
- Type in 2nd number
- Enter