Subtract up to 4-digit numbers Learn ... Number bonds to 100 Learn about number bonds to 100 using tens and ones. Fact families - addition and subtraction bonds to 20 Learn how part whole models ...

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. Methods for adding and subtracting Learn about efficient addition and subtraction ... show how to add up to 3-digits and ...