Our paper aims to achieve two objectives. Firstly, one objective is to teach addition and subtraction using dynamic models that are related to the concept of base ten blocks using 2D model: equal ...

Column addition is a way of adding numbers together. It's helpful when you're adding two-digit or three-digit numbers together. When you do column addition, you lay out the numbers you are adding ...

Adding larger numbers in your head is not always easy. If you need to use pen and paper, then the column method is a good way to add. It involves writing one number beneath the other, so that the ...