There are two ways to find the answer to subtraction calculations. First, you could start on the smaller number and count up to reach the bigger number. This works if the two numbers are close ...

Let's look at another subtraction. It's not possible to subtract ... Rename 3 as 13 and then subtract: 13 - 7 = 6 If you can subtract two 3-digit numbers from each other, then you can use the ...