Mental Math

Clear, approachable guidance with examples you can apply in everyday situations.

Take your time with each concept. Try a small example, explain the steps, and check whether the result makes sense.

Break numbers apart

Split a calculation into easier parts, such as adding tens and then ones.

For 39 + 26, add 40 + 26 and subtract 1 from the result.

Round values first to predict a sensible range, then calculate more precisely.

Return to the basics whenever a step feels unclear, and use estimates to check that your answer is reasonable.