Adding 2-digit and 1-digit numbers without regrouping means combining a number that has tens and ones (like 23) with a number that only has ones (like 6). The important thing is that when you add the ones together, the total stays less than 10. This way, you don't have to carry any extra tens over to the tens column. It's all about simple addition!
For example, if you have 32 + 7, you only add the 2 and the 7. Since 2 + 7 = 9, the answer is 39. The tens place (the 3) stays the same. Let's get started with some practice!
| Term | Definition |
|---|---|
| 1. Digit | A. The value of a digit based on its position in a number. |
| 2. Place Value | B. To combine numbers to find the total. |
| 3. Addition | C. A symbol used to represent addition (+). |
| 4. Plus Sign | D. Any of the numerals from 0 to 9. |
| 5. Sum | E. The total when you add two or more numbers. |
Match each term with its definition.
When adding 2-digit and 1-digit numbers without __________, we only add the ones place. The __________ place stays the same. For example, in the problem 45 + 3, we add 5 and 3, which equals 8. So, the answer is __________. This is because we are only adding to the __________ place and not making a new group of tens.
Explain in your own words why it's important to understand place value when adding numbers.
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