The Ladder Method

  How Do Ladders Help With Math???  
This is a math strategy that can be used in for three different concepts!!   Once you get the hang of it, it is a real game changer and saves some time.      You can use it when simplifying fractions, finding the Least Common Multiple, or Greatest Common Factor

Here is a video that explores this concept step by step!  

Something you really need to know is your PRIME NUMBERS.  It helps you get a good start when using the Ladder.  You really need to use the smaller ones.  It is good to have the first 5 or 6 memorized. 





 



You also need to know your MATH FACTS!  If you struggle with knowing your basic math facts fluently, then practice, practice, practice!  You want it to be automatic.  

CCSS.MATH.CONTENT.5.NF.A.1
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. 

For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)