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Missing Addends - Worksheet 2 - 1st Grade

Easy

Find the missing number in addition equations (Easy)

15 problems · 10-15 minutes · Skills: addition, algebraic thinking

About This Worksheet

This easy-level worksheet contains 15 problems designed for 1st Grade students practicing missing addends. Easy worksheets use simpler numbers and straightforward problem types to build confidence and reinforce foundational skills.

Missing addend problems introduce algebraic thinking — finding an unknown value. This prepares students for equation solving in later grades.

How to Solve: Worked Example

Example Problem: 3 + ___ = 7
Solution Steps:
  1. Think: 3 plus what equals 7?
  2. Count up from 3 to 7: 4, 5, 6, 7 — that's 4 jumps.
  3. The missing number is 4.
Answer: 4
Tip: Count up from the given number to the total. The number of jumps is your answer!
1
2 + ___ = 7
2
2 + ___ = 4
3
1 + ___ = 3
4
7 + ___ = 8
5
4 + ___ = 5
6
2 + ___ = 4
7
1 + ___ = 3
8
7 + ___ = 8
9
1 + ___ = 5
10
3 + ___ = 5
11
5 + ___ = 6
12
4 + ___ = 6
13
6 + ___ = 7
14
1 + ___ = 4
15
6 + ___ = 8

Answer Key

1. 52. 23. 24. 15. 16. 27. 28. 19. 410. 211. 112. 213. 114. 315. 2

Frequently Asked Questions

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How many problems are on this worksheet?

This worksheet contains 15 problems. It typically takes 10-15 minutes to complete. An answer key with all solutions is included.