How to Convert From Binary to Decimal

This video tutorial explains how to convert binary numbers to decimal numbers, a key skill for GCSE computer science exams. It covers the importance of understanding place value in both binary and decimal systems, and provides a step-by-step guide to the conversion process. The tutorial emphasizes the need to show working out in exams to secure full marks, even if the final answer is incorrect. The example used is the binary number 10110110, which converts to 182 in decimal.

What is the first step in converting a binary number to a decimal number for GCSE exams?

• Memorize the binary number

• Convert the binary number to hexadecimal first

• Understand the place value number grid

• Write the binary number backwards

In binary, what operation is performed as you move one place to the left?

• Divide by two

• Multiply by two

• Multiply by ten

• Add ten

How many columns are typically used in binary conversion for GCSE exams?

• 8 columns

• 10 columns

• 4 columns

• 6 columns

When converting the binary number 10110110, which decimal values should be added together?

• 128, 64, 16, 8, 2

• 64, 32, 16, 8, 4

• 128, 32, 16, 4, 2

• 32, 16, 8, 4, 2

Why is it important to show your working out in a GCSE exam?

• To save time during the exam

• To confuse the examiner

• To gain extra marks even if the final answer is wrong

• To make the exam paper look neat