England · Year 6 · Ages 10–11 · Common mistakes

Year 6 Four Operations: Common Mistakes & Fixes

Understand common Year 6 four operations mistakes, why they happen and how to fix them with short practice checks.

Learn from errors

Three mistakes to watch for

These are common ways children can become stuck on this type of question. Use the short check after each one to make sure the correction is understood.

1

Reading a digit by itself instead of using its place

Why it happens: A digit can represent a different value depending on its position, which matters in four operations.

Fix it: Name the place first (ones, tens, hundreds and so on), then state the digit's value.

Quick check: Point to one digit in a number and explain its value using the word operation.
2

Changing more than one place when counting on or back

Why it happens: Crossing a tens, hundreds or larger boundary can make a sequence look less familiar.

Fix it: Say the sequence aloud and mark the boundary number before continuing.

Quick check: Write three numbers before and three numbers after a boundary value.
3

Comparing numbers from the ones side first

Why it happens: The largest place determines which whole number is greater.

Fix it: Compare from the leftmost place and stop at the first place that differs.

Quick check: Explain which place you compared first and why.
Next step

Turn the explanation into practice

Use the printable for independent work, or return to the topic overview to choose another way to practise.

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