1. Word cloud
120 seconds
What is the definition of rounding?
2. Slide
60 seconds
Rounding is a way of changing a number to make it easier to work with.
What is Rounding?
3. Slide
60 seconds
Rounding: The process of finding an approximate value of a number by replacing it with the closest multiple of a given number. Place Value: The value of a digit based on its position in a number. Estimation: A rough calculation or judgment of the value, number, quantity, or extent of something.
Concepts:
4. Slide
60 seconds
The concept of rounding dates back to the ancient Babylonians, who used a base-60 system for counting and mathematics. The term 'rounding' was first used by mathematician, Carl Friedrich Gauss, in 1794 when he wrote about a 'rounding off of numbers.'
Did you know?
5. Open question
180 seconds
Work together in pairs: What is the difference between rounding to the nearest ten and rounding to the nearest hundred?
6. Personalised Feedback
360 seconds
If you have 28 apples and you want to round it to the nearest 10, how many apples would you have?
7. Open question
180 seconds
If you have 122 birds and you want to round to the nearest hundred, what does it round to? What about rounding 122 to the nearest 10?
8. Drawings
450 seconds
Brain break: Draw a magical gorilla who can fly and shoot rainbows out of its belly button
9. Poll
60 seconds
What is 191 rounded to the nearest ten?
- 20
- 25
- 30
- 35
10. Poll
60 seconds
What is 146 rounded to the nearest hundred?
- 200
- 140
- 100
- 150
11. Poll
60 seconds
What is 83 rounded to the nearest five?
- 85
- 90
- 80
- 75
12. Poll
60 seconds
What is 1.7 rounded to the nearest whole number?
- 4
- 2
- 1
- 3
13. Poll
60 seconds
What is 3.14 rounded to one decimal place?
- 2.9
- 3.1
- 3.0
- 4.0
Made with ❤️ from Norway