1. Greatest Common Factor
The largest (Greatest) number that divides (Factor) into both (Common) terms.

2. Least Common Multiple
The smallest (Least) number that is divisible by (Multiple) both (Common) terms.

3. Upside down Cake Method….
Example: Step 1: Think of any number than divides evenly into both…

4. Upside down Cake Method….
Example: 2
Then, divide
each term
by that
number!!

5. Upside down Cake Method….
Example: 2
Put the
answer
after you
divide
under the cake!!

6. Upside down Cake Method….
Example: 2 3
Make a new cake
and check to see if
there is another
number than will
divide into both terms.

7. Upside down Cake Method….
Example: 2 3
Nothing divides into 8 and 3, so
you are done!!
Now to use
this information
to find the
LCM/GCF…..

8. Upside down Cake Method….
Example: 2
GCF:
Multiply the
numbers that you divided out
together…
this is your
GCF!!
**Mult. The
numbers in
the box! 3

9. Upside down Cake Method….
Example: 2
GCF:
Multiply the
numbers that you divided out
together…
this is your
GCF!!
**Mult. The
numbers in
the box! 3
2 X 3 = 6
GCF = 2

10. Upside down Cake Method….
Example: 2
LCM:
We use the
same
information,
only now
we multiply
all the
number not
inside the
cake!! 3

11. Upside down Cake Method….
Example: 2
LCM:
We use the
same
information,
only now
we multiply
all the
number not
inside the
cake!! 3
LCM 2 x 3 x 8 x 3 = 144
LCM = 144

12. Greatest Common Factor
The largest (Greatest) number that divides (Factor) into both (Common) Greatest Common Factor terms. * This will be the smaller number of the two answers you find using this method.

13. Least Common Multiple
The smallest (Least) number that is divisible by (Multiple) both (Common) terms. * This will be the larger number of the two answers you find using this method.