Adding Three Small Numbers · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Adding three numbers the smart way

Mathematics · Addition & Subtraction · ages 6-7
Name ______________________   Date ____________

  1. Add 2 + 3 + 4. Type the total.

    Answer: ______________

  2. What is 4 + 6 + 3?

    Answer: ______________

  3. What is 2 + 3 + 5?

    • 9
    • 11
    • 8
    • 10

  4. Look at 6 + 4 + 5. Which two numbers make 10?

    • 6 and 4
    • 6 and 5
    • 4 and 5

  5. What is 6 + 4 + 7?

    • 15
    • 17
    • 16
    • 18

  6. What is 1 + 9 + 4?

    Answer: ______________

  7. Which pair makes 10 in 8 + 2 + 6?

    • 8 + 2
    • 2 + 6
    • 8 + 6
    • 8 + 8

  8. Which pair should you add first to make 4 + 6 + 8 easier?

    • 4 and 8
    • 6 and 8
    • 4 and 6

  9. Zoe adds 3 + 8 + 2 by doing 3 + 8 = 11, then 11 + 2 = 13. Did she pick the easiest pair?

    • No, 3 + 8 is already 10
    • No, 8 + 2 = 10 would be easier
    • Yes, that is the only way

  10. What is 9 + 8 + 1?

    • 19
    • 16
    • 18
    • 17
LightMySky · lightmysky.comW1-mt_Zx1xZM-RbX-s1

Answer key

For grown-ups. Fold this page away before handing over the rest.

Adding three numbers the smart way W1-mt_Zx1xZM-RbX-s1

  1. 9 · 2 + 3 = 5, then 5 + 4 = 9. All three numbers add up to 9.
  2. 13 · 4 + 6 = 10, then 10 + 3 = 13.
  3. 10 · 2 + 3 + 5 equals 10.
  4. 6 and 4 · 6 + 4 = 10. That is the pair to add first.
  5. 17 · 6 + 4 = 10, then 10 + 7 = 17.
  6. 14 · 1 + 9 = 10, then 10 + 4 = 14.
  7. 8 + 2 · 8 + 2 = 10.
  8. 4 and 6 · 4 + 6 = 10. Then 10 + 8 = 18.
  9. No, 8 + 2 = 10 would be easier · 8 + 2 = 10 is easier to add first. Then 10 + 3 = 13, the same answer with easier steps.
  10. 18 · 9 + 1 = 10, then 10 + 8 = 18.
Worksheet · LightMySky