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

The video tutorial explains how to multiply 30 by 40. It starts by simplifying the problem to multiplying 3 by 4, which results in 12. The teacher then explains the importance of place value by adding two zeros to the product, resulting in the final answer of 1200. The tutorial concludes with a brief mention of the marks awarded for the correct answer.

What is the first step in solving the multiplication problem 30 * 40?

• Add 30 and 40

• Multiply 3 by 4

• Subtract 30 from 40

• Divide 40 by 30

What is the result of multiplying 3 by 4?

• 10

• 14

• 12

• 7

Why do we add zeros to the result of 3 * 4 when calculating 30 * 40?

• To simplify the calculation

• To make the number larger

• To account for the place value of tens

• Because 30 and 40 are even numbers

How many zeros are added to the final answer of 30 * 40?

• None

• One

• Two

• Three

What is the final answer to the multiplication problem 30 * 40?

• 2400

• 1200

• 120

• 300