September 2016 archive

LCM/ GCF

How to find the LCM

Find the greatest common factor of the two numbers

112 and 700

GCF= 28

2.  Divide one of the numbers by the GCF

112/28= 4

3. Multiply that number by the other number

(4)(700)= 2800

 

How to find the GCF

Write your numbers next to each other

144    132

 

2. Write a number that they are both divisible by underneath

144    132

2

3. Divide them

144    132

2

72    66

4. Keep going until you can’t go anymore

144    132

2

72    66

2

36    33

3

12    11

 

5. Multiply all of the numbers down the middle

(2)(2)(3)= 12

6. 12 is the greatest common factor

I like using the method that we did in class because it is easier to me.