Math practice · Week 20 · Thursday
I can estimate to decide if something will fit, then measure to check.
Look: Will 4 cups fit on a 10-inch shelf?
- Each cup is about 3 inches wide.
- 3 + 3 + 3 + 3 = 12 inches.
- 12 is more than 10, so they will not fit.
Add to estimate. Write yes or no.
- Each book is about 2 inches thick. Will 5 books fit on a 12-inch shelf?Answer: Yes. 2 + 2 + 2 + 2 + 2 = 10 inches, and 10 is less than 12.
- Each toy car is about 4 inches long. Will 3 cars fit in a 10-inch box, end to end?Answer: No. 4 + 4 + 4 = 12 inches, and 12 is more than 10.
- A ruler is 30 cm long. A pencil case is 25 cm long. Will the ruler lie flat inside?Answer: No. 30 is more than 25.
Estimate or measure exactly? Circle one.
- Guessing if a ball fits in a bagestimatemeasure exactlyAnswer: estimate
- Cutting a board for a shelfestimatemeasure exactlyAnswer: measure exactly
Challenge
- Find a shelf at home. Estimate how many of one thing will fit. Then check.Answer: Answers vary. Look for: an estimate, a check, and a yes or no.
Second Grade · Week 20 · Thursday · secondgrade.com