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Grade 1 Adding Three Numbers Worksheet with Answers

Grade 1 (US) · Year 2 (UK) · Class 1 (India) · Math

Unit 2: Addition & Subtraction FactsAddition StrategiesCCSS 1.OA.A.2

Adding three numbers by looking for doubles or a make-ten pair first. This free early elementary worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Adding Three Numbers

Grade 1 · Math

Score___ / 12

Name

Class

Date

Learning goal: Addition Strategies · CCSS 1.OA.A.2

Directions: Solve each problem. Show your work, then write your answer in the box.

Example

3 + 2 + 3 = ?

Answer: 8

RememberCounting on with a number line

012345678910111213145 + ? = 13 → count the hops: 8
  1. 1

    1 + 1 + 5 = ?

    Answer
  2. 2

    6 + 3 + 3 = ?

    Answer
  3. 3

    9 + 1 + 3 = ?

    Answer
  4. 4

    8 + 4 + 1 = ?

    Answer
  5. 5

    5 + 7 + 2 = ?

    Answer
  6. 6

    2 + 5 + 6 = ?

    Answer
  7. 7

    3 + 2 + 7 = ?

    Answer
  8. 8

    5 + 2 + 5 = ?

    Answer
  9. 9

    4 + 3 + 9 = ?

    Answer
  10. 10

    5 + 3 + 8 = ?

    Answer
  11. 11

    8 + 6 + 2 = ?

    Answer
  12. 12

    4 + 4 + 9 = ?

    Answer

★ Challenge corner for fast finishers

In this magic square every row, column and diagonal adds up to 24. Row 1: ____, 6, 11 | Row 2: 12, 8, 4 | Row 3: 5, 10, 9. What is the missing number?

61112845109

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/math/1/three_addends

Answer key (click to show)
  1. 1.7
  2. 2.12
  3. 3.13
  4. 4.13
  5. 5.14
  6. 6.13
  7. 7.12
  8. 8.12
  9. 9.16
  10. 10.16
  11. 11.16
  12. 12.17
  13. ★7 (challenge corner)

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How to use this worksheet

  • Keep it short: a few questions at a time works better than a whole page at once for young learners.
  • Read the questions aloud together if your child is still building reading confidence.
  • Check the answers straight after, while the thinking is still fresh, and praise effort as well as results.

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