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Third/Subtraction

Adding and Subtracting Three Single-Digit Numbers

Practice adding and subtracting 3 single-digit numbers to improve arithmetic skills.
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Study Guide

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Adding and Subtracting Three Single-Digit Numbers preview

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Practice Questions

  1. 6 + 2 - 3 = ?
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    5

  2. 5 + 3 - 4 = ?
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    4

  3. 7 + 1 - 6 = ?
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    2

  4. 8 + 2 - 5 = ?
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    5

  5. 9 + 1 - 7 = ?
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    3

Teacher Resources
Lesson Plan

Mixed Addition and Subtraction Strategies

Standards
2.OA.B.2
Printable Aids
Number LineCounters
Teaching Notes

Guide students to solve problems left-to-right, breaking them down into two-step operations. Encourage mental math strategies like making tens or counting on/back. Emphasize basic fact fluency.

Vocabulary
Sum: The result of adding numbers.
Difference: The result of subtracting numbers.
Common Mistakes
  • Incorrect order of operations (not left-to-right)
  • Errors in basic addition/subtraction facts
  • Mismanaging mental steps in multi-part problems
Differentiation
SupportProvide manipulatives (counters, number line) or encourage drawing pictures. Break each problem into two separate two-number problems. Focus on one operation at a time first.
ChallengeIntroduce missing number problems (e.g., 5 + ? - 2 = 6). Challenge with multi-step word problems involving three numbers, or extend to larger single-digit numbers resulting in sums over 20.
Discussion Questions
  • When you have three numbers to add or subtract, what order should you follow?
  • Can you think of a real-life situation where you might add or subtract three numbers?
  • What strategies help you solve these problems quickly in your head?
Extension Activities
  • Use number cards to make your own problems.
  • Try adding first, then subtracting.
Parent Tip

Use small objects like buttons or coins to act out the problems.

Learning Path
Skill Cluster

Number Sense & Operations

Grade Level

2-3

Skills Practiced
Adding single digit numbersSubtracting single digit numbersOrder of operations simple