Before children get to grips with the Year 4 Add Two 4-Digit Numbers 1 step, try this Year 4 Add Two 4-Digit Numbers 1 recap activity. It focuses on the Year 3 step of adding two 3-Digit numbers, in which children add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction, so that children are prepared for the Year 4 step. There are three varied fluency and three problem-solving and reasoning questions to tackle, and a useful answer sheet to use too!