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Learning Objective: Round numbers to a given number of decimal places.

Updated 3 months ago

1. Slide

60 seconds

UNIT 3.2 ROUNDING (DECIMALS)

DEGREE OF ACCURACY

2. Slide

60 seconds

Rounding Decimals

Rounding decimals means making a number simpler but keeping its value close to what it was. To round, look at the digit to the right of the one you want to round to. If it's 5 or greater, add 1 to the digit you want to round to. If it's 4 or less, just leave the digit you want to round to as it is.

3. Open question

300 seconds

What is the difference between rounding to the nearest whole number and rounding to a given number of decimal places?

4. Slide

60 seconds

Did you know?

The word 'round' comes from the Latin word 'redundare' which means 'to make full again' The first use of a symbol for rounding dates back to the 5th century AD In mathematics, a number is considered to be 'rounded' when it is neither greater nor less than the original number

5. Personalised Feedback

360 seconds

If you have a decimal number like 3.78 and you need to round it to the nearest whole number, what would be the result and why?

6. Slide

60 seconds

A curipod slide

7. Slide

60 seconds

8. Slide

60 seconds

A curipod slide

9. Poll

40 seconds

Round 5.592 to the nearest hundredth.

- 5.60
- 6.59
- 5.50
- 5.59

10. Slide

60 seconds

A curipod slide

11. Poll

60 seconds

Round $278.49 to the nearest hundred dollars.

- $200
- $270
- $300
- $260

12. Open question

210 seconds

Round off 5.662198 to 4 d.p.

13. Poll

60 seconds

If I round off 34.8972 to 2 d.p., the answer would be 34.9

- TRUE
- FALSE

14. Open question

210 seconds

Round off 78.931 to 2 d.p.

15. Poll

60 seconds

What is the equivalent decimal place value of hundredth?

- 0.1
- 0.01
- 0.001
- None

16. Poll

60 seconds

How well do you understand this topic?

- Confident 😎
- Fairly good 🙂
- I need help ☺️

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