GCSE Secondary Maths Age 13-17 - Number: Significant Figures - Explained

The video tutorial explains how to round the number 56.78 to one significant figure. It begins by introducing the concept of significant figures and uses a bank balance example to illustrate the importance of identifying the most significant digit. The tutorial then outlines the steps to round a number, emphasizing the rule that numbers five or more round up. It concludes by highlighting common mistakes, such as losing place value, and provides the correct rounded answer.

What is the most significant figure in the number 56.78?

• 8

• 7

• 6

• 5

When rounding 56.78 to one significant figure, which digit determines if the rounding goes up?

• 8

• 7

• 6

• 5

What is the result of rounding 56.78 to one significant figure?

• 56

• 50

• 60

• 6

Why is it incorrect to write '6' as the answer when rounding 56.78 to one significant figure?

• Because 6 is not rounded

• Because 6 is not a significant figure

• Because it loses the place value

• Because 6 is less than 5

What is the place value of the digit '5' in the number 56.78?

• Tens

• Units

• Hundreds

• Thousands