IGCSE Maths / Fractions, decimals and rounding

Calculating with 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

When you combine rounded measurements, use their bounds inside the calculation to find the greatest or least possible answer. The bounds you choose depend on the operation, not simply on which measurements are largest.

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
• Finding upper and lower bounds