Open Number Lines 1 | 2nd Math Special | 28m 42s | Video has closed captioning. In this lesson, students use different addition and subtraction strategies to solve equations using an open number line.

An open number line can start and stop wherever you want it to. If you're struggling with this concept, go ahead and get a number line and match it up underneath yours to help you figure out where ...

They tried to show that there is, at most, a certain number N of zeros outside this straight line x = 1 / 2. The hope is to reduce N until N = 0 at some point, thereby proving the Riemann conjecture.

Preschool-age children who frequently play number-related games at home show better math skills and growth by the end of kindergarten, finds a new study in the journal Child Development.