### Home > MC1 > Chapter 7 > Lesson 7.2.1 > Problem7-38

7-38.

Greg is building a fence. He places two sections end to end. One section measures $3$ meters, and the other measures $120$ centimeters.

1. Greg thinks the fence will be $123$ units long but is not sure what the units are. His sister Elisa thinks he is wrong. What do you think? Explain.

Elisa is right. Do you know why?

2. Find at least two ways to express the length of the fence.

Try writing the length in meters and centimeters.