In this video, the teacher explains how to mentally add or subtract 10 to a number using a hundreds chart. The charts are used to visualize the addition or subtraction process, making it easier to understand and solve the problems mentally.
In this video, the teacher explains how to mentally add or subtract 10 to a number using a hundreds chart. The charts are used to visualize the addition or subtraction process, making it easier to understand and solve the problems mentally.