It's possible to solve some multiplication problems in your head. But sometimes it can help to use other methods instead. These include using visual aids, such as an array or place counters, or by ...

Addition involves finding the total of two or more numbers or amounts. There are different things you can use to help you add. You can use number lines, place value charts and place value counters.

Build, read, write, and represent three-digit numbers using base-10 blocks and symbols. Build, read, write (in standard and expanded form), and represent three-digit numbers using base-10 blocks and ...