Making ten is a strategy in math that helps us add numbers more easily. The idea is to break down numbers and combine them to make a ten, because adding ten is always simple! For example, if you want to add $8 + 5$, you can think of 5 as $2 + 3$. Then, you add the 2 to the 8 to make 10, and then add the remaining 3. So, $8 + 5 = 8 + 2 + 3 = 10 + 3 = 13$. These worksheets will help you practice this skill!
Match the term with its definition:
| Term | Definition |
|---|---|
| 1. Addend | a. The result of addition |
| 2. Sum | b. A strategy to simplify addition |
| 3. Make Ten | c. Numbers that are added together |
(Match 1 with c, 2 with a, and 3 with b)
Making ten helps us ______ numbers quickly. We break down one of the ______ to make a ten. Adding ten to any number is always ______. For example, to solve $7 + 5$, we can break 5 into $3 + ______. Then, $7 + 3 = ______$, and $10 + 2 = ______$.
(Answers: add, numbers, easy, 2, 10, 12)
Explain in your own words why making ten is a useful strategy for solving addition problems. Can you think of a time when making ten would not be the best strategy?
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