Adding multiples of ten is a super important skill in math. It helps you quickly add numbers like 10, 20, 30, and so on to other numbers. This makes mental math easier and faster! When you add multiples of ten, you're only changing the tens place in the number. For example, if you have 23 and you add 20, you're just changing the 2 in the tens place to a 4, so the answer is 43!
Let's say you have 34 and you want to add 40. Think of it like this: you have 3 tens and 4 ones, and you're adding 4 more tens. That means you'll have 7 tens and 4 ones, which makes 74. Easy peasy! This skill will help you with all sorts of math problems, so let's get practicing! Adding multiples of ten is a foundational skill for more complex arithmetic, and it builds number sense.
Match the following terms with their definitions:
| Term | Definition |
|---|---|
| 1. Multiple of Ten | A. The place value representing tens (e.g., in 45, it's 40) |
| 2. Sum | B. To combine numbers to find the total |
| 3. Tens Place | C. A number you can get by multiplying by 10 (e.g., 10, 20, 30) |
| 4. Add | D. The result of adding two or more numbers |
| 5. Combine | E. To put numbers together |
Use the words from Part A to complete the sentences.
When we ______ multiples of ten, we are finding the ______. A ______ is a number like 20, 30, or 40. The ______ is important because it tells us how many groups of ten we have. When we ______ numbers, we put them together.
Explain in your own words how adding multiples of ten can help you solve math problems faster. Give an example.
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