Lesson 35: Word Problems About Comparing and Elapsed Time

Open Ended

Why is it important to understand how to compare and calculate elapsed time in everyday life?

Multiple Choice

Which of the following is the product of 7 × 9?

• 63

• 56

• 49

• 72

Open Ended

Choose an appropriate problem-solving strategy to solve this problem. Montrelyn has a pet dog and a pet cat. Together the two animals weigh 42 pounds. The dog weighs 14 pounds more than the cat. How much does each pet weigh?

Open Ended

How can comparing and elapsed time word problems be solved?

Multiple Choice

Which of the following is an example of a comparison problem?

• Finding the total cost of two items

• Finding how much taller one person is than another

• Finding the area of a rectangle

• Finding the sum of two numbers

Fill in the Blanks

Fill in the blank: Larger - Smaller =

Multiple Choice

Which equation correctly represents how to find the difference between two quantities in a comparison word problem?

• Larger + Smaller = Difference

• Larger - Smaller = Difference

• Smaller - Larger = Difference

• Larger × Smaller = Difference

Fill in the Blanks

The biggest player weighed 245 pounds. The smallest player weighed 160 pounds. How much more did the biggest player weigh than the smallest player?

Open Ended

Explain how you would use a visual model to solve a word problem where one person is a certain number of years younger than another. What steps would you follow?

Multiple Choice

Which of the following best describes 'elapsed time'?

• The time at which an event starts

• The total time in a day

• The amount of time between two points in time

• The time at which an event ends

Multiple Select

Select all the steps needed to find the number of years between two dates, such as 1492 and 1620.

• Subtract the earlier year from the later year

• Add the two years together

• Multiply the years

• Write the later year above the earlier year and subtract

Fill in the Blanks

A school day at Edison School begins at 8:10 a.m. and ends at 3:15 p.m. What is the length of the school day at Edison School?

Multiple Choice

After practicing multiplication facts, how confident do you feel about solving word problems that require multiplication?

• Very confident

• Somewhat confident

• Not very confident

• I need more practice

Open Ended

Reflecting on today's lesson about word problems involving comparing and elapsed time, what is one strategy you found most helpful for solving these types of problems?

Multiple Choice

What are the two main skills you need to solve comparing and elapsed time word problems?

• Explaining and demonstrating

• Memorizing and guessing

• Drawing and labeling

• Estimating and rounding