Number Bonds — Sums with 10 Worksheets for 1st Grade
Find the missing part of pairs that add up to 10 ("friends of 10"). 15 free printable worksheets, each with an answer key.
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Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Number Bonds — Sums with 10: what children learn
"Friends of 10" (pairs that add to 10) are the single most useful facts in early math — they're the backbone of the "make ten" strategy used for adding and subtracting bigger numbers later.
Number Bonds — Sums with 10: worked example
6 + __ = 10 4
6 and 4 are "friends of 10," since 6 + 4 = 10.
Number Bonds — Sums with 10: a common mistake to watch for
These facts are worth drilling until instant — kids who still count on their fingers for friends of 10 will struggle with the make-ten strategy in later addition topics.
Number Bonds — Sums with 10: how to help at home or in class
Play a card game similar to concentration: lay out cards 0 through 10 face down and flip two at a time, keeping a pair if the numbers make ten together. Or hold up fingers and ask your child to show the folded-down fingers. Keep playing until the answer comes without counting. Your child is ready for making a ten to add bigger numbers when every pair is automatic, and you can build on it with sums up to 20.
What is on these Number Bonds — Sums with 10 worksheets
This set has 15 different worksheets for 1st grade, with 9 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Write the missing part in the empty circle.”
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers