IGCSE Maths / Fractions, decimals and rounding

Rounding to decimal places and significant figures

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

Read the revision notes · IGCSE Maths past papers

Decimal places count digits after the decimal point, while significant figures start at the first non-zero digit. In both cases, the next digit decides whether to round up or leave the last kept digit unchanged.

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
• Estimating by rounding
• Finding upper and lower bounds
• Calculating with bounds