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Other Fraction Stuff

GCF, LCM, and Sieve of Erathosenes

Sieve Of Erathosenes At 2:35, I went to the 7-11 and bought 13 slurpies $17.19
GCF Tips Look for all numbers that have a number in common
LCM Tips For LCM write down every number that makes the number
Divisibility Rule for 2 The number in the ones place must be even
Divisibility Rule for 3 The sum of the digits must be divisible by 3
Divisibility Rule for 6 The number must be divisible by 2 AND 3
Divisibility Rule for 9 The sum of the digits must be divisible by 9
Divisibility Rule for 5 The number in the ones place must be a 5 or 0
Divisibility Rule for 10 The number in the ones place must be a 0
Steps For Prime Ladder Start with numbers, find smallest prime number, divide, repeat, when you get to a number that is only 1 and itself you end, the numbers on the left side from least to greatest are the Prime Factorization.
LCM Prime Ladder Steps Smallest Prime numbers both numbers have, divide numbers by 2, make L for LCM
Strategies for 2 numbers List, tree, and ladder
Strategies for 3 numbers List and Tree
GCF Strategies For 2 numbers: List, Ladder, and Tree. For 3 numbers: List and Tree
Popular Math sets




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