๐ Topic Summary
Estimating and rounding are like superpowers for math! ๐ฆธ Rounding makes numbers simpler by finding the nearest ten, hundred, or thousand. Estimating uses rounding to quickly guess an answer. For example, if you want to add 48 and 23, you can round 48 to 50 and 23 to 20. Then, you can easily estimate that the answer is close to 70!
๐ค Part A: Vocabulary
Match each term with its definition:
| Term |
Definition |
| 1. Estimate |
a. A number close to the exact amount. |
| 2. Round |
b. To find a number that is close to the exact number. |
| 3. Nearest Ten |
c. The closest multiple of 10. |
| 4. Nearest Hundred |
d. The closest multiple of 100. |
| 5. Approximation |
e. An educated guess. |
โ๏ธ Part B: Fill in the Blanks
Use the words rounding, estimate, nearest, about to complete the paragraph.
When you ______ a number, you find the _______ ten or hundred. To _______, you make a quick guess of what the answer will be. Estimating gives you a result that is _______ right.
๐ค Part C: Critical Thinking
Sarah wants to buy a toy for $26 and a book for $14. Explain how she can use rounding to estimate the total cost before going to the checkout.