📚 Topic Summary
Benchmark numbers are easy-to-use numbers, like 10, 25, 50, and 100, that we can use to estimate and compare other numbers. Instead of working directly with tricky numbers, we can round them to the nearest benchmark number. This makes math problems much simpler! For example, if you have 48 apples, you can think of it as 'almost 50' to make it easier to estimate.
This worksheet will help you practice identifying and using benchmark numbers. Good luck!
🔤 Part A: Vocabulary
Match the terms with their definitions:
| Term |
Definition |
| 1. Estimate |
A. A number close to an exact amount |
| 2. Benchmark Number |
B. An approximate calculation |
| 3. Rounding |
C. A number that is easy to work with for estimation |
| 4. About |
D. To find the nearest value |
| 5. Close To |
E. Not exactly |
(Answers: 1-B, 2-C, 3-D, 4-E, 5-A)
✍️ Part B: Fill in the Blanks
Use the words benchmark, estimate, rounding, easier, and close to complete the paragraph.
Using a __________ number can make math problems __________. When we __________ to the nearest ten, we find a number that is __________ to the original number. This helps us to __________ answers quickly.
(Answers: benchmark, easier, rounding, close, estimate)
🤔 Part C: Critical Thinking
Explain why using benchmark numbers can be helpful in everyday life. Give at least two examples.