KS2 Primary Maths Age 9-13 - Number: - Explained

The video tutorial explains how to pair numbers that either add or multiply to equal 1. It begins with an example of addition, demonstrating how to verify pairs by reversing the process using subtraction. The tutorial then transitions to multiplication, showing how to pair numbers by adjusting decimal places. The video concludes with a verification process to ensure all pairs are correct, emphasizing the importance of accuracy in mathematical operations.

What is the first step in pairing numbers that add up to 1?

• Add the numbers directly

• Multiply the numbers

• Subtract one number from 1

• Divide the numbers

Which pair of numbers adds up to 1?

• 0.3 and 0.8

• 0.89 and 0.11

• 0.5 and 0.6

• 0.25 and 0.75

How do you determine the number to multiply with to get a product of 1?

• Divide the numbers

• Move the decimal point

• Add the numbers

• Subtract the numbers

What do you multiply 0.001 by to get 1?

• 10

• 1000

• 0.1

• 100

Which pair of numbers multiplies to 1?

• 0.5 and 2

• 0.2 and 3

• 0.1 and 5

• 0.25 and 4

What is the result of multiplying 0.25 by 4?

• 0.5

• 1.0

• 0.75

• 1.5

How many decimal places should be in the answer when multiplying 0.5 by 20?

• 1

• 2

• 3

• 4