Lesson: Selling Snacks

Before or after reading the article, spark a discussion based on the following questions:

• What are some expenses that are involved in owning a business?
• If you owned a vending machine business, what would you sell in your machines and why?

• What are some ways we can compare numbers? (Answers will vary. Possible answers: Use place value charts or blocks, stack/align numbers, use a number line.)
• Which place value should you start with when comparing numbers? (the highest place value)
• What is the main difference between a whole number and a decimal number? (In a decimal number, there is a decimal point that separates the whole number part from the fractional part of a number.)
• What are some examples of decimal numbers we use in the real world? (Answers will vary. Possible answers: money, time, test scores, etc.)
• Play the math video “Comparing and Ordering Decimals.”

• What do you notice about the place values to the right of the decimal point in the chart? (They represent tenths and hundredths.)
• In what order do we move across the chart to compare the numbers? (left to right)
• Do we have to look at the hundredths place to compare these numbers? Why or why not? (No, because the tenths place shows us that 1.75 is greater than 1.20. The tenths place has a greater value than the hundredths place.)

Have students complete problems 1 through 4 on page 11 of the article.

Skills Sheets: Level Down: Roll a Decimal | On Level: DynaDash: Comparing Decimals With Place Value Charts |Level Up: Rounding Decimals With Number Lines

SEL (Social-emotional learning activity/prompt): In the article, students learned that Mikey teaches other kids how to start their own businesses. Have students think about something they can do very well. Then have them write a summary or lesson plan for how they would teach the skill or talent to someone else.

Dynamath@Home: Have students use a timer or stopwatch to run a race. Choose a start and end point for the race. Students should ask a family member or friend to time them running the race three times. Then have them sort their times from fastest to slowest.