An Introduction to Cross Number Puzzles Across the Grades Created by: Lyn Channey, Kristy Garvin, Karen Kissel, Barbara Wennerberg, and Amy Zell

What is this? 31? 42? ???

What could you do with this? 31? 42? ???

When I point to you, click on the next number to sort these shapes

How many circles do I have?

4

How many rectangles do I have? 4

4 4

How many blue shapes do I have? 4 4

4 4 4

How many green shapes do I have? 4 4 4

4 4 44

How many total shapes do I have?

What number sentences could I make? 4 purples + 4 greens = 8 shapes4 circles + 4 rectangles = 8 shapes

This is a Kindergarten Cross Number Puzzle

In First Grade it might look like this:

Flip it in Second Grade to show subtraction:

Expand it to show two-digit addition

What number sentence does this represent?

=

Now let’s try it with regrouping

What number sentence does this represent?

=

Array Model of Multiplication 4 2

What does this represent? 4 2

2 x 4 = 8 4 2

From here it moves to multi-digit multiplication Array Model X

Here is what the cross number puzzle would look like alone

What number sentence does this represent?

15 x 22 =

In Conclusion…

Any Questions?

Celebrate! You have just expanded your knowledge of Math!