Rounding with a Vertical number line. A vertical number line is the same as a regular number line except that it runs vertically instead of horizontally. When rounding, there are two saying that are used to help students know when to round up or stay the same.
The first example is as follows:
5 or more, raise the score
4 or less, let it rest
The second example is as follows:
Bossy numbers: 5, 6, 7, 8, and 9
Bossy numbers push the line leader forward
Non-bossy numbers: 0, 1, 2, 3, and 4
Non-bossy numbers tell the line leader to stay the same
In class, we have started our study of vertical number lines. Watch this video to better your understanding of how to round by clicking on the link below.