When it comes to adding three-digit numbers together where the calculation crosses the hundred, there's no better resource to use than place value charts! Use this Year 3 Add Two Numbers (Across a 100) Homework resource to give your children plenty of practise with addition. The questions are differentiated three ways, and provide varying levels of support across the resource. But, we're not just trying to help children at Classroom Secrets, we have teachers in mind, too! That's why we've included a nifty little answer page with this resource, which will cut your marking time down considerably.