# Rounding 9/11

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Curipod generated lesson: "Rounding". #1-4

1. Poll
60 seconds
What is rounding?
• Approximating a number to the nearest whole number
• Finding the square root of a number
• Dividing a number by 10
• Multiplying two numbers together
2. Poll
60 seconds
When rounding to the nearest ten, what do you do if the digit in the ones place is less than 5?
• Increase the tens digit by 1 and change all digits after it to zero
• Keep the tens digit the same and change all digits after it to zero
3. Poll
60 seconds
When rounding to the nearest ten, what do you do if the digit in the ones place is equal or greater than 5?
• Keep the tens digit unchanged and remove all digits after it
• Increase the tens digit by 1 and change all digits after it to zero
4. Slide
60 seconds
Rounding is a way of changing a number to make it easier to work with. You round a number by finding which number it is closest to. For example, 7 is closest to the number 8, so 7 rounded is 8.
What is Rounding?
5. 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:
6. Slide
60 seconds
7. Slide
60 seconds
A curipod slide
8. Open question
300 seconds
What do you think is the most important thing to remember when rounding?
9. Open question
180 seconds
Work together in pairs: What is the difference between rounding to the nearest ten and rounding to the nearest hundred?
10. Drawings
450 seconds
Brain break: Draw a wacky octopus juggling pineapples in space
11. 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?
12. Open question
180 seconds
Work together in pairs: What is the main difference between 'round up' and 'round down'?
13. Poll
60 seconds
What is 27 rounded to the nearest ten?
• 20
• 25
• 30
• 35
14. Poll
60 seconds
What is 146 rounded to the nearest hundred?
• 200
• 140
• 100
• 150
15. Open question
180 seconds
Work together in pairs: What is the easiest way to remember which way to round a number?