addition, subtraction, empty set, placeholder, rounding off, numbers, educational Email us at [email protected] if you have questions about the footage and are interested in using it in your ...

You can add and subtract using your knowledge of doubles and number bonds ... of different tools that help you to do mental addition and subtraction. Remember, it doesn't have to be done entirely ...

This can include whole numbers or integers ... on a line, their sizes can be compared. One can be greater or less than another, they can be ordered, and you can use them in addition, subtraction ...

Subtraction ... between two numbers. You can also count on to find the difference between two numbers. For example, what is the difference between 10 and 7? Let's use a number line to help.