GCSE Secondary Maths Age 13-17 - Number: Standard Form - Explained

The video tutorial explains how to write numbers in standard form, which consists of three parts: a number between 1 and 10, multiplied by 10, raised to an index. It demonstrates converting a large number into standard form and solving a division problem using a calculator. The tutorial also covers manual calculation methods and emphasizes the importance of showing work to earn full marks. The video concludes with a reminder of the components of standard form and the allocation of marks for the exercises.

What is the first part of a number in standard form?

• A number less than 1

• A number between 1 and 10

• A number greater than or equal to 10

• A number multiplied by 100

How many places is the decimal moved in the example to convert 640,000,000 to standard form?

• 4 places

• 10 places

• 8 places

• 6 places

What is the standard form of 640,000,000?

• 6.4 x 10^6

• 6.4 x 10^8

• 0.64 x 10^9

• 64 x 10^7

When dividing numbers in standard form, what operation is performed on the indices?

• Subtract the indices

• Divide the indices

• Multiply the indices

• Add the indices

What is the result of dividing 3 x 10^7 by 6 x 10^4 in standard form?

• 0.5 x 10^3

• 5 x 10^2

• 5 x 10^3

• 0.5 x 10^2