Addition and subtraction - Check answers - Worksheet

The worksheet from masterthecurriculum.co.uk is designed to enhance fluency and precision in checking answers for addition and subtraction problems. Catering to the National Curriculum objective of solving problems, including missing number problems, using number facts, place value, and more complex addition and subtraction, the worksheet provides differentiated sheets and teaching slides to support learning. Essential vocabulary such as 'answers', 'inverse', 'errors', 'sensible', 'multiples', and 'near numbers' are highlighted to help children explore ways of verifying the reasonableness of their answers. The use of the inverse operation is encouraged to ensure that children do not repeat mistakes and to confirm their results by using a different method.

Children are prompted with key questions to stimulate their thinking, such as how to determine if an answer is sensible and the relevance of knowing if a number is close to a multiple of 100 when adding and subtracting three-digit numbers. The worksheet includes activities where children use multiples of 5 and a range of numbers in their calculations. They are tasked with writing complete inverse calculations and checking their work using the inverse. Additionally, reasoning and problem-solving sections challenge children to apply their understanding of inverse operations to investigate possible calculations and explain their reasoning. The worksheet is structured to support children working towards, within, and at greater depth to cater to varying levels of proficiency.