Add and subtract three-digit numbers with ... It's our friend DC! DC is a Math Might friend that wears a hard hat and carries a mallet. DC loves to solve problems with decomposing and composing.

And while honeybees can't yet write out Einstein's general theory of relativity, new evidence suggests the clever little pollinators can perform simple addition and subtraction after a few math ...

Want to help your second-grader master the basics of 2nd grade math? Here are some of the skills ... Understand that in adding two three-digit numbers, you are adding hundreds and hundreds ...

You probably haven’t had to do longhand math in years, but you do mental math every day. Or maybe you google math problems ... subtraction is easiest when you can subtract each digit without ...

You need to exchange a digit from the next column. Let's look at another subtraction. It's not possible to subtract 7 from 3, so exchange one ten from the tens column for ten ones. Rename 3 as 13 ...

Want to help your first-grader master math ... subtraction as “taking apart” and “taking away from.” Understand comparing situations. Solve all of these situations with any of the three ...