IGCSE Maths / Fractions, decimals and rounding

Finding upper and lower bounds

Edexcel International GCSE Maths (4MA1), chapter 1: Fractions, decimals and rounding, specification point 1.8a. Part of the full course.

Read the revision notes · IGCSE Maths past papers

Upper and lower bounds show the range of values that could round to a stated measurement. Find the rounding unit, halve it, then go that distance either side of the given value.

More lessons in Fractions, decimals and rounding

• Directed numbers
• Equivalent fractions and simplifying
• Mixed numbers and improper fractions
• Adding and subtracting fractions
• A fraction of a quantity
• Multiplying and dividing fractions
• Ordering decimals
• Fractions, decimals and percentages
• Recurring decimals to fractions
• Mixed recurring decimals
• Rounding to decimal places and significant figures
• Estimating by rounding
• Calculating with bounds