Estimation is an important mathematical skill that helps students make sensible calculations without always needing an exact answer. It is particularly useful when solving everyday problems involving money, measurements, quantities and time.

For Australian students, learning to estimate can make mathematics more practical and easier to apply outside the classroom.

Consider shopping at a supermarket. A student who can estimate the total cost of several items can quickly determine whether their spending is likely to remain within a budget. Similarly, estimating travel time can help families plan journeys and understand distances.

Estimation also supports mathematical reasoning. Before completing a calculation, students can predict what a reasonable answer might look like. This makes it easier to recognise mistakes and identify answers that seem unrealistic.

For example, when calculating 198 multiplied by 5, students can round 198 to 200 and estimate an answer of 1,000. They can then compare this estimate with their exact calculation.

Parents and teachers can encourage estimation through everyday activities, mental mathematics games and practical measurement exercises.

Students should also practise rounding numbers, comparing quantities and checking answers before submitting assessments.

Developing estimation skills strengthens number sense, improves confidence and encourages independent thinking. These abilities help students approach mathematical challenges more logically, both at school and in everyday life.