Three is the Magic Number Zach is helping his mother plan his ninth birthday party for Saturday. He is inviting 9 of his best buddies. Zach tells his mother that his friends love pepperoni pizza. His mother decides to order enough pizza for each boy, including Zach, to eat 3 pieces of pizza each. Can you help Zach and his mother figure out how many pieces they will eat in all?

First you will need to skip count by threes to find out how many pieces of pizza will be eaten by a total of 10 children. Click on each box and fill in with the number that goes there.

Hint: Remember, you are counting by sets of three. If you get stuck, just add three to the previous number to get your answer.

When you get the correct answer, the kids get pizza!
 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23,

Now let's practice!!!

Fill in the missing numbers by skip counting by threes.

 3, 6, 12, 15, , 21, 24, , 30, 33, ,

Now we can help Zach's mother find out how many slices of pizza will be eaten in all. Remember, there are ten children eating three pieces of pizza each. Skip count by three to find out how many slices in all.

 Click on the numbers to count them out. The numbers should be in order of threes.

Look around your home or classroom. Find 30 beans, 30 pennies, 30 marbles, or 30 of any small object. Put them in groups of three. How many groups do you have? If you make 10 groups with three in each group, how many in all?