# Unit 3.2 Rounding Decimals

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

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 ☺️