The video also discusses zero as a placeholder in larger numbers and its importance in rounding off figures. Overall, it clarifies that zero is an essential number, not a troublemaker in arithmetic.

Save guides, add subjects and pick up where you left off with your BBC account. A number line is a straight line with numbers written in order from lowest to highest. Number lines can go up to any ...

One identifying characteristic of real numbers is that they can be represented over a number line. Think of a horizontal line. The center point, or the origin, is zero .

Teaching in Room 9. Open Number Lines 2 | 2nd Grade Math. Special | 28m 38s Video has Closed Captions | CC. Addition & subtraction strategies to solve two-digit equations using an open number line.