# Counting On Missing Addend Worksheets

Adding Doubles (eg. 3 + 3)

How to use the Counting On Strategy to find Missing Addend?

Counting-on can also be applied to find a missing addend in an addition problem.

1. Understand the Concept:
Explain to students that counting-on can be used to find a missing addend by starting with one of the numbers and counting forward to the sum.
2. Identify the Known Addend and Sum:
Given an addition problem with a missing addend, identify the known addend and the sum. For example, in
6 + __ = 9, 6 is the known addend, and 9 is the sum.
4. Count On to the Sum:
Continue counting forward until you reach the sum. In the example, count on from 6: 7, 8, 9. So, the missing addend is 3.

Using counting on to find a missing addend is a practical application of this mental math strategy. It reinforces number sense and helps students develop a deeper understanding of addition concepts. Regular practice with such problems will strengthen their ability to use counting on efficiently.

Click on the following worksheet to get a printable pdf document.
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### More Counting On Missing Addend Worksheets

(These worksheets are printable files with answers on the second page.)
Counting On Missing Addend Worksheet #1
Counting On Missing Addend Worksheet #2

Addition within 10 (eg. 3 + 5)
Addition within 20 (eg. 6 + 8)

Missing Addend (sums < 10) (eg. __ + 5 = 7)
Missing Addend Word Problems (eg. 8 + __ = 17)

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.