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

The video tutorial explains how to multiply numbers by 1000 by moving digits three places to the right. It provides both a mathematical and a non-mathematical explanation, emphasizing the importance of understanding the number of zeros involved. The tutorial concludes with the final answer and a note on formatting without using commas to avoid confusion with decimal points.

What is the key step when multiplying a number by 1000?

• Move the digits three places to the right

• Divide the number by 1000

• Add three zeros to the left of the number

• Subtract three from the number

What is the importance of understanding the number of zeros in 1000?

• It helps in dividing numbers

• It determines how many places to move the digits

• It is used to add zeros to the left of the number

• It is irrelevant to multiplication

How many zeros are added to the number 101 when multiplying by 1000?

• Four zeros

• One zero

• Two zeros

• Three zeros

Why is it suggested not to use commas in the final answer?

• Commas are only used in large numbers

• Commas make the number look smaller

• Commas can be confused with decimal points

• Commas are not allowed in mathematics

What is the final answer when 101 is multiplied by 1000?

• 10,100

• 101,000

• 1,010,000

• 100,100