This number bonds to ten worksheet asks for the missing part in twelve addition equations. Every total is ten, and the supplied first addends range from zero through ten. The collection includes a practice image and a separate answer-key image.
Find the missing part
Read the entire equation before writing. In “3 + ___ = 10,” the blank is an addend, not the total. A learner can count on from three, represent the known part on a ten frame, or recall a familiar pair. Keep the meaning of the blank consistent while changing the known number.
Connect the equations to a full ten frame
Represent the first addend, then count the spaces left to make ten. Write that count in the equation and check by combining the two parts. For a zero addend, discuss why the other part must account for the whole ten. Repeated or reversed pairs are useful opportunities to notice the relationship rather than unrelated facts to memorize.
Use the key after an attempt
The answer sheet fills each missing number. If an answer differs, return to the known part and show the two groups together. One incorrect item does not tell you why an error happened; ask the learner to explain the representation or counting step.
Extend the activity without changing its goal
Cover the first number and ask which part is missing from a completed equation, or choose a pair and show it in another arrangement. Keep the total at ten for this page. This worksheet practices a specific part-whole relationship and does not include facts with other totals.
Answer key in text
- 0 + 10 = 10
- 1 + 9 = 10
- 2 + 8 = 10
- 3 + 7 = 10
- 4 + 6 = 10
- 5 + 5 = 10
- 6 + 4 = 10
- 7 + 3 = 10
- 8 + 2 = 10
- 9 + 1 = 10
- 10 + 0 = 10
- 3 + 7 = 10
Download and print
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