Worksheet: Counting by Threes up to 100

In this worksheet, we will practice counting in multiples of 3 within 100.


Hannah knows she does not need to say every number when counting the blocks. She is counting in 3s.

How many blocks are there?


Sophia is counting in 3s.

What is 3 less than 21?

What is 3 more than 21?


The pink monsters have 9 eyes altogether. Count in 3s to find how many eyes all of the monsters have in total.


Each monster has 3 eyes. Ethan is counting in threes to find how many eyes there are.

How many eyes are there in total?


Find the total number of candy by counting in 3s.

Find the total number of candy if we add 3 more pieces.


Find the missing number on the number line by counting in 3s.

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