If you've got pupils who have flown through their work on mental calculations and estimation, why not give them a go at the testing, open-ended, problem-solving questions in this Year 6 Mental Calculations and Estimation challenge activity? The questions encourage children to apply their knowledge in new ways to tricky problems and, if done as a group task, are great for promoting discussion and mathematical talk.

The questions can be done alone, in a group or with an adult as a discussion partner, at school or at home. The pack also comes with a handy example answer sheet, so you or the children themselves can quickly check that their answers are on track.