By combining the two parts in the whole circle we can find the sum ... with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction ...

Now that you've learned to do basic math in Excel, your calculations will never slow you down again. With addition, ...

By combining the two parts in the whole circle we can find the sum ... with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction ...