KS2 Primary Maths Age 13-17 - Calculations: Written Multiplication - Explained

The video tutorial explains the process of multiplying numbers, starting with 5 times 4 to get 20, and then multiplying 20 by 10 to reach 200. It emphasizes the concept of place value, where digits shift to the left when multiplying by 10 or 100. The tutorial concludes with the final answer of 200, highlighting the importance of understanding digit movement in arithmetic operations.

What is the result of multiplying 5 by 4?

• 25

• 20

• 15

• 10

When multiplying a number by 10, what happens to the digits?

• They move one place to the left

• They stay in the same place

• They move one place to the right

• They disappear

What is the quick way to multiply a number by 10?

• Subtract two zeros from the end

• Subtract a zero from the end

• Add a zero to the end

• Add two zeros to the end

How many places do digits move when multiplying by 100?

• One place

• Two places

• Four places

• Three places

What is the final result of multiplying 5, 4, and 10 together?

• 100

• 150

• 250

• 200