It's a lesson you learn as early as grade school: If you find yourself injured, threatened or otherwise in harm's way, just break out your phone and dial a simple, three-digit number: 911. After more ...

The Federal Communications Commission is proposing to launch a new three-digit hotline for people who are feeling suicidal or are going through any other mental health crisis. It recommends making 988 ...

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.

Join Mrs. McCartney for a comparison word problem with her friend Professor Barble. Join Mrs. McCartney for a comparison word problem with her friend Professor Barble. Next, get ready to order 3-digit ...

Your credit card has a 16-digit number on the front, plus an expiration date, and another three-digit code on the back. We all know in a vague way that the code on the back (also known as the “CVC” or ...

Division is the opposite of multiplication. It's when a number is shared into another number. Knowing your times tables can be very useful when multiplying or dividing. Let’s take a look at some ...

This pin might make you an easy target. Many people have difficulty selecting and remembering a passcode, especially when it involves four-digit pins. But if you plan to default to something as easy ...