Multiplication & Division MYSTERY!

Multiplication & Division

MYSTERY!For our BBES 3rd Graders

Fact FamiliesRemember: if you know ONE fact in

a fact family, you know the WHOLE, ENTIRE fact family!

Like… if you know 2 x 5 = 10Then you know 5 x 2 = 10

and 10 5 = 2

and 10 2 = 5

Fact Families

Or

if you know 20 4 = 5

Then you know 20 5 = 4

and 5 x 4 = 20

and 4 x 5 = 20

It’s a PIECE OF CAKE!

Using what you know about fact families, figure out the number that is missing in

each number model!Write it on your white board when

you know the answer!

What number is missing?

6 x ____ = 36


6 x 6 = 36


____ x 4 = 12


3 x 4 = 12


9 ____ = 3


9 3 = 3


7 x ____ = 49


7 x 7 = 49


9 x ____ = 27


9 x 3 = 27


56 ____ = 7


56 8 = 7


5 x ____ = 40


5 x 8 = 40


10 ____ = 2


10 5 = 2


3 x ____ = 24


3 x 8 = 24


81 ____ = 9


81 9 = 9


2 x ____ = 20


2 x 10 = 20


18 ____ = 3


18 6 = 3


12 x ____ = 144


12 x 12 = 144


32 ____ = 8


32 4 = 8


10 x ____ = 50


10 x 5 = 50


8 ____ = 8


8 1 = 8

Now look at the number model given on each of the next slides. Write the three number models that are in

the same fact family as those equations.

What equations complete the fact family?

7 x 3 = 21

____ x ____ = _____

____ ____ = _____

____ ____ = _____


7 x 3 = 213 x 7 = 21

21 7 = 3

21 3 = 7


18 9 = 2

____ ____ = _____

____ x ____ = _____

____ x ____ = _____


18 9 = 218 2 = 9

2 x 9 = 18

9 x 2 = 18


4 x 2 = 8

____ x ____ = _____

____ ____ = _____

____ ____ = _____


4 x 2 = 82 x 4 = 8

8 2 = 4

8 4 = 2


3 x 11 = 33

____ x ____ = _____

____ ____ = _____

____ ____ = _____


3 x 11 = 3311 x 3 = 33

33 11 = 3

33 3 = 11

Way to go!!!

Multiplication & Division MYSTERY!

Documents

number models

entire fact family

fact familiesorif

gradersfact familiesremember

white board

piece of cake