Recap subtracting 3 digits from 3 digits with this Year 4 Efficient Subtraction resource. Before children can work out the most efficient way to subtract, it's important they know or are at least aware of the different ways to subtract! This resource uses six questions from a previous step to remind children about subtracting 3-digit numbers from 3-digits numbers, in both a varied fluency and reasoning and problem-solving capacity. An answer sheet has also been provided to allow children to self-mark or peer mark, or to hopefully save you a little time!