x

What estimating means

Three number lines showing 48.7 rounding to 50, 0.196 rounding to 0.2, and 431.1 rounding to 400 to one significant figure

Estimating means giving a sensible answer that is close to the exact value. In IGCSE questions, you usually round awkward numbers first so the arithmetic is quick and mental.

Estimating Lesson

IGCSE
Maths
Estimating

Step-by-step lessons covering CIE IGCSE Maths Estimating for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.

Lessons

x

What estimating means

Three number lines showing 48.7 rounding to 50, 0.196 rounding to 0.2, and 431.1 rounding to 400 to one significant figure

Estimating means giving a sensible answer that is close to the exact value. In IGCSE questions, you usually round awkward numbers first so the arithmetic is quick and mental.

Estimating Lesson

IGCSE
Maths
Estimating

Step-by-step lessons covering CIE IGCSE Maths Estimating for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.