๐ Topic Summary
The 'Making Tens and Hundreds' strategy is all about simplifying addition and subtraction by regrouping numbers to the nearest ten or hundred. By doing this, you break down complex problems into smaller, more manageable steps. For example, to add 9 + 6, you can think of it as 10 + 5 (since 9 is close to 10). Similarly, when dealing with larger numbers, like 98 + 35, you can adjust to 100 + 33.
This strategy is especially useful for mental math and estimation. Understanding how to manipulate numbers in this way builds a strong foundation for more advanced mathematical concepts. Let's put your skills to the test!
๐ค Part A: Vocabulary
Match each term with its definition:
| Term |
Definition |
| 1. Regrouping |
A. A number close to the actual value. |
| 2. Estimation |
B. Combining numbers to form a ten or hundred. |
| 3. Rounding |
C. Rearranging numbers to make calculations easier. |
| 4. Compatible Numbers |
D. Adjusting a number to the nearest ten or hundred. |
| 5. Number Sense |
E. A skill for understanding and using numbers effectively. |
โ๏ธ Part B: Fill in the Blanks
Complete the following paragraph using the words provided: hundred, easier, ten, regrouping, mental math.
The strategy of making a ______ or ______ simplifies calculations and makes ______ ______. It relies on the concept of ______ to rearrange numbers, which ultimately makes the problem ______. This method is an effective approach to problem-solving.
๐ค Part C: Critical Thinking
Explain, in your own words, how the 'Making Tens and Hundreds' strategy can help you solve math problems more efficiently. Give at least two examples.