Lesson 10 Solve Problems Involving Time (Part 1)

    • Let’s solve problems involving time.

Warm-up Choral Count: Fifteens

Count by 15 minutes, starting at 12:00.
What patterns do you see?

Activity 1 Time at the Bus Stop

Illustration. Sign for a bus stop.

  1. Kiran arrived at the bus stop at 3:27 p.m., as shown on this clock. He waited 24 minutes for his bus to arrive.

    What time did his bus arrive? Show your thinking. Organize it so it can be followed by others.

  2. Elena arrived at the bus stop at 3:45 p.m. She also waited 24 minutes for her bus to arrive.

    What time did the bus arrive? Show your thinking. Organize it so it can be followed by others.

    Analog clock showing time.

Activity 2 Time on the Bus

Here’s another problem about time:

At 6:32 p.m., Elena got on a bus to go home. She got off the bus at 7:10 p.m. How long was her bus ride?

Which strategy or representation would you use when solving a problem like this? Explain your reasoning.

Practice Problem

Problem 1

Mai left to walk the dog at 6:50 a.m. and she returned at 7:44 a.m. How much time did Mai spend walking the dog?