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