In this lesson students will find 10 more or 10 less than any given number between 1 and 100. Students will start with tools to help them, like a hundreds chart or base-10 blocks, but the goal of this lesson is to be able to calculate 10 more or 10 less mentally. Students will explain their thinking using place value language or patterns on a hundreds chart. How can we identify ten more or ten less than a given number? Each Cohesion Education video has been designed by teachers for parents! All