Get children in the mood to exchange digits for different subtractions with this Year 4 Subtract Two 4-Digit Numbers - One Exchange Prior Learning worksheet. The questions on this resource are based on objectives found in year 3 that are linked to this lesson and will prepare children for the new learning that takes place. With a mixture of varied fluency, reasoning and problem-solving questions, children will be able to put all of their skills into practise.

Use this at the beginning of your lesson to gauge where children's knowledge is currently at. Alternatively, this can be used as an intervention activity for those who might need additional support with their subtracting skills, or give this to children to begin their school day with. The answer sheet is a great way to encourage peer or self-assessment, or use it to speed through your marking.