Adding and Subtracting Lengths
Read this topicExplanations 2
- Adding and subtracting lengths of collinear segments is a lot like doing addition and subtraction on a number line: a segment of length 9 plus a segment of length 4 yields a seg…
By Anonymous, Jon Graetz
- Example: Adding and Subtracting lengths \\ We are familiar with addition and subtraction of numbers. What is different about adding and subtracting lengths? The unit! Lengths ar…
By Christine
Problems 10
- Darwin takes an 11×1111\times 1111×11 grid of lattice points and connects every pair of points that are 1 unit apart, creating a 10×1010\times 1010×10 grid of unit squares. If h…
- Suppose point A is at position 111, point B is at position 444, and BC is 333 units long. What is the length of AC?
- Jamilla, Andy, and Cassie are all classmates and are doing a group project. They chose to be in each other's group because they all live in the same neighborhood. Suppose Andy w…
- Jason and Andrew are camping and found the following materials for a bow drill. Unfortunately, the piece of wood for the spindle is 222 feet and too long to be useful. How much …
- Find AC‾−BD‾\overline{AC}-\overline{BD}AC−BD
- The following number line represents the time it takes Jenny to get ready for school. Because her bus is taking a new route, she now has to wake up 181818 minutes earlier than n…
- Suppose on a number line, xxx is at position 222, yyy is at position −4-4−4, and zzz is positioned at 777. What is the distance between yyy and zzz?
- Anna worked on her math homework for 454545 minutes. She then checked her work for an additional 222222 minutes and finished at 8:30 pm. What time did Anna start working?
- Consider the road sign above. How far is Salinas from San Francisco?
- Jack, Alex and Christine live in the same neighborhood. Jack invited Alex and Christine for food. Christine walk 0.5km to Alex's, and together they walked 1 mile to Jack's. How …