Missing Addend Worksheets Sums < 20

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Lessons for Second Grade
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Printable “Missing Addend” Worksheets:
Missing Addend, Sum < 10 (eg. __ + 5 = 7)
Missing Addend, Sum < 20 (eg. __ + 7 = 15)
Missing Addend, Multiples of 10 (eg. 8 + ___ = 30)

Missing Addend Worksheets

Find missing addends with sums less than 20.

A missing addend refers to a number that is not given in an addition problem but needs to be determined to complete the equation. Understanding and solving problems with missing addends is an important skill in elementary mathematics.

Some useful strategies are count on, subtraction, use known facts, and make ten.

Strategies to Find Missing Addends:

  1. Counting Up: Start with the given number and count up to the sum.
  2. Subtraction: Teach students that subtraction is the inverse operation of addition. If they know the total and one of the addends, they can subtract to find the missing addend.
  3. Using Known Facts: Encourage students to use their knowledge of known addition facts to find missing addends.
  4. Make Ten: Use the number pairs that make ten to find the missing addend. 1+9, 2+8, 3+7, 4+6, 5+5

In these Second Grade math worksheets, students determine what is the missing addend to get the given sum.

Have a look at this video if you need to revise how to find a missing addend by using count on or subtraction.

Click on the following worksheet to get a printable pdf document.
Scroll down the page for more Missing Addend Worksheets.

Missing Addend Worksheet for Second Grade

More Missing Addend Worksheets

(Answers on the second page.)
Missing Addend Worksheet #1
Missing Addend Worksheet #2

Missing Addend Worksheet #1 (Interactive)
Missing Addend Worksheet #2 (Interactive)

Missing Addend (Dynamic, Interactive)

Missing Addend with sums equal to 10, 20, 30 or 40

Adding to 10 (10 + 6 = __)
Fact Family 10 (Add & Subtract) (eg. 10 - 4)
1-digit + 1-digit (eg. 6 + 8)
Missing Addend (eg. __ + 7 = 15)
Make 10 strategy (eg. 67 + 4)

More Printable Worksheets

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.
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