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

The video tutorial explains the process of performing long multiplication using the example of 5413 multiplied by 86. It breaks down the multiplication into two parts: first multiplying by 6 and then by 80, emphasizing the importance of carrying over numbers and placing zeros correctly. The tutorial also discusses the marking scheme, highlighting the importance of showing correct working to earn method marks, even if the final answer is incorrect. Tips on managing carry-over numbers are provided to ensure clarity and accuracy.

What is the first step in solving the multiplication problem 5413 * 86?

• Add 5413 to 86

• Multiply 5413 by 6

• Multiply 5413 by 8

• Subtract 86 from 5413

When multiplying 5413 by 80, why is it important to place a zero in the units column?

• To ensure the multiplication is by 80, not 8

• To avoid errors in addition

• To simplify the final answer

• To make the calculation easier

What is the result of multiplying 5413 by 6?

• 32478

• 32578

• 32468

• 32568

What is the final answer to the multiplication problem 5413 * 86?

• 465518

• 4655181

• 4655180

• 4655188

What is one key aspect to remember when carrying over numbers in long multiplication?

• Always carry over to the left

• Ignore the carry if it's zero

• Cross out the carry once used

• Write the carry at the bottom