1. Word cloud
120 seconds
What is two plus two?
2. Slide
60 seconds
Near doubles are two numbers that are very close together, like 3 + 4. Adding one more to each number makes a double, like 4 + 5. Practicing near doubles can help you get faster at addition!
Maths Near Doubles
3. Slide
60 seconds
Near Doubles: A calculation that involves two numbers that are close in value, such as 4 + 6 or 7 + 9. Compensation: The process of adjusting one part of a calculation to make up for changes in another part. Commutative Property: A property of mathematics that states that a number multiplied by a second number is equal to the same second number multiplied by the first number.
Concepts:
4. Slide
60 seconds
Doubling numbers is an important part of Japanese numerical culture, where the doubling of numbers is associated with good luck. The mathematical term 'near double' was first used in the 17th century by Swiss mathematician Jacob Bernoulli. The near double of a number is found by subtracting 1 from the number and then multiplying it by 2.
Did you know?
5. Open question
180 seconds
Work together in pairs: What two numbers can you add together to get a number that is almost double the first number?
6. Open question
180 seconds
Work together in pairs: What are two numbers that are close to the same value but slightly different?
7. Drawings
450 seconds
Brain break: Draw a monkey wearing a superhero costume fighting a giant banana monster with laser eyes.
8. Poll
60 seconds
What is 6 + 7?
- 13
- 12
- 14
- 15
9. Poll
60 seconds
What is 8 + 9?
- 17
- 16
- 18
- 19
10. Poll
60 seconds
What is the near double of 5?
- 9
- 10
- 11
- 6
11. Poll
60 seconds
what is the near double of 8?
- 15
- 16
- 14
- 20
12. Poll
60 seconds
Which number comes after the near-double of 4?
- 9
- 10
- 11
- 12
Made with ❤️ from Norway