Adding and Subtracting 100s

By the end of this unit, students will be able to:

1. add and subtract multiples of 100 to/from two-digit and three-digit numbers;
2. understand how adding 100 increases a number’s value, and subtracting 100 decreases a number’s value;
3. use place value concepts to visualize and solve addition and subtraction problems involving 100s;
4. apply the concept of adding and subtracting 100s to solve real-life and mathematical problems.