GCSE Secondary Maths Age 13-17 - Number: Upper & Lower Bounds - Explained

The video tutorial explains how to determine error intervals using inequalities, focusing on rounding to two decimal places. It covers the concepts of upper and lower bounds, demonstrating how to calculate these bounds and apply them to find the error interval for a given value, N. The tutorial also discusses the impact of measurement and rounding on error intervals, providing a step-by-step breakdown of the process and highlighting the importance of understanding these concepts in mathematical problem-solving.

What is the next value above 4.76 when rounding to two decimal places?

• 4.74

• 4.77

• 4.75

• 4.78

What is the lower bound when rounding 4.76 to two decimal places?

• 4.77

• 4.75

• 4.765

• 4.755

Which of the following is the upper bound for the number 4.76?

• 4.75

• 4.765

• 4.755

• 4.77

When expressing error intervals using inequalities, what is the correct representation for N?

• N < 4.765

• N > 4.755

• N ≤ 4.765

• N ≥ 4.755 and N < 4.765

Why is it important to understand upper and lower bounds in measurements?

• To get exact measurements

• To avoid rounding errors

• To know the possible range of error

• To simplify calculations