Image caption, If you put them in a number sentence, they form the addition 15 + 3 = 18 ... 18 - 15 = 3 is the subtraction. You can't swap the numbers around in a subtraction, so you couldn ...

Here's how to use Excel as a calculator to perform basic arithmetic operations such as addition, subtraction ... For instance ...

Learn how column addition can be used to make adding numbers easier. Addition and subtraction methods Learn ... examples and a video to show how to add up to 3-digits and 1-digit numbers.