KS2 Primary Maths Age 9-13 - Calculations: Written Multiplication - Explained

The video tutorial explains a multiplication process using the example of multiplying 418 by 48. It begins by breaking down the multiplication into smaller steps, first multiplying by 6 and then by 40, emphasizing the importance of aligning digits correctly. The tutorial also highlights the significance of placing a zero when multiplying by tens to ensure method marks are awarded. Finally, it demonstrates the addition of partial results to arrive at the final answer, 19228, and explains the marking scheme, which includes points for the correct method and final answer, allowing for one arithmetic error.

What is the result of multiplying 8 by 6 in the first step of the calculation?

• 48

• 54

• 42

• 36

What is the result of multiplying 4 by 6 in the first section?

• 20

• 24

• 28

• 26

Why is it important to add a zero when multiplying by 40?

• To ensure the correct place value

• To avoid arithmetic errors

• To make the calculation easier

• To get extra marks

What is the final answer after adding the two multiplication results?

• 20228

• 18228

• 17228

• 19228

How many marks are awarded for the correct method in this question?

• Two marks

• No marks

• Three marks

• One mark