Number bonds · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Number bonds within 20

Mathematics · Addition & Subtraction · ages 5-6
Name ______________________   Date ____________

  1. Given 13 - 5, what is the answer using the bond 8 + 5 = 13?

    Answer: ______________

  2. Quickly: what is 8 + 5?

    • 13
    • 12
    • 14
    • 11

  3. What is 8 + 5?

    • 12
    • 13
    • 14

  4. 7 and 8 make a pair that adds up to 15.

    Circle one:   True   False

  5. What is 9 + 6?

    Answer: ______________

  6. 8 stars and 5 stars are together. How many stars in all?

    Answer: ______________

  7. Which pair bonds to 10?

    • 8 and 3
    • 6 and 4
    • 7 and 4
    • 5 and 6

  8. Ella says that if 13 - 5 = 8 then 5 + 8 = 13. Is Ella right?

    Circle one:   True   False

  9. Mia sees 14 − 6 and answers 6. What went wrong?

    • She named the number she subtracted, not the answer
    • She added instead of subtracting
    • She forgot the number 14

  10. 11 = 7 + [ ]. What is the missing bond part?

    • 3
    • 5
    • 6
    • 4
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Answer key

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

Number bonds within 20 W1-mt_s2mfRBoTal-s1

  1. 8 · Since 8 + 5 = 13, it follows that 13 - 5 = 8.
  2. 13 · 8 plus 5 is 13.
  3. 13 · 8 and 5 make 13. You know this bond by heart.
  4. True · 7 + 8 = 15, so yes, that pair adds up to 15.
  5. 15 · 9 plus 6 is 15.
  6. 13 · 8 and 5 make 13. That is a bond you know.
  7. 6 and 4 · 6 and 4 bond to 10.
  8. True · Ella is right, because 5 + 8 is 13.
  9. She named the number she subtracted, not the answer · The bond is 8 + 6 = 14, so 14 − 6 = 8, not 6. Mia repeated the wrong number.
  10. 4 · 7 plus 4 is 11, so the missing part is 4.
Worksheet · LightMySky