A blog about teaching and learning in a maths classroom.

Friday, 30 April 2010 | Comments

Here’s a quick starter activity for rounding.

Show this slide (or write the numbers on the board).

Ten questions to ask… for these questions, the answers are “possible answers” (discussion point):

- Which number has been rounded to the nearest hundred? (12300, 400, 25000)
- Which number has been rounded to 1 decimal place? (0.7, 9.9)
- Which number has been rounded to the nearest thousand? (25000)
- Which number has been rounded to 2 decimal places? (1.32, 0.80)
- If counting by hundreds, the number after the green number would be. (12400)
- Which number has 4 decimal places? (17.1345)
- In the blue number, which digit is in the tenths place value? (7)
- Round the pink number to the nearest hundredth. (17.13)
- Which number rounded to the nearest unit would equal 10? (9.9)

- Which numbers rounded to the nearest unit would equal 1? (1.32, 0.80, 0.7)

The PowerPoint file includes the slide and the questions in the *notes* section.

Rounding Quiz
PPT, 427 kB

This work is licensed under a Creative Commons License (?).

Posted in • Lesson Idea • Rounding • Starter • Technology • PowerPoint • Projector Resource | Short URL: http://mths.co/1821

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**Simon Job** — eleventh year of teaching maths in a public high school in Western Sydney, Australia.

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