IM: 7.4.6: Increasing and Decreasing (Lesson)
By Formative Staff
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Last updated 7 months ago
13 questions
6.1: Improving Their Game
Here are the scores from 3 different sports teams from their last 2 games.
What do you notice about the teams’ scores? What do you wonder?
What do you notice about the teams’ scores? What do you wonder?
Which team improved the most? Explain your reasoning.
Which team improved the most? Explain your reasoning.
6.2: More Cereal and a Discounted Shirt
A cereal box says that now it contains 20% more. Originally, it came with 18.5 ounces of cereal. How much cereal does the box come with now?
A cereal box says that now it contains 20% more. Originally, it came with 18.5 ounces of cereal. How much cereal does the box come with now?
The price of a shirt is $18.50, but you have a coupon that lowers the price by 20%. What is the price of the shirt after using the coupon?
The price of a shirt is $18.50, but you have a coupon that lowers the price by 20%. What is the price of the shirt after using the coupon?
6.3: Using Tape Diagrams
Match each situation to a diagram. Be prepared to explain your reasoning.
Compared with last year’s strawberry harvest, this year’s strawberry harvest is a 25% increase.
Compared with last year’s strawberry harvest, this year’s strawberry harvest is a 25% increase.
This year’s blueberry harvest is 75% of last year’s.
This year’s blueberry harvest is 75% of last year’s.
Compared with last year, this year’s peach harvest decreased 25%.
Compared with last year, this year’s peach harvest decreased 25%.
This year’s plum harvest is 125% of last year’s plum harvest.
This year’s plum harvest is 125% of last year’s plum harvest.
Draw a diagram to represent these situations.
The number of ducks living at the pond increased by 40%.
The number of ducks living at the pond increased by 40%.
The number of mosquitoes decreased by 80%.
The number of mosquitoes decreased by 80%.
What could it mean to say there is a 100% decrease in a quantity? Give an example of a quantity where this makes sense.
What could it mean to say there is a 100% decrease in a quantity? Give an example of a quantity where this makes sense.
6.4: Agree or Disagree: Percentages
Do you agree or disagree with each statement? Explain your reasoning.
Employee A gets a pay raise of 50%. Employee B gets a pay raise of 45%. So Employee A gets the bigger pay raise.
Employee A gets a pay raise of 50%. Employee B gets a pay raise of 45%. So Employee A gets the bigger pay raise.
Shirts are on sale for 20% off. You buy two of them. As you pay, the cashier says, “20% off of each shirt means 40% off of the total price.”
Shirts are on sale for 20% off. You buy two of them. As you pay, the cashier says, “20% off of each shirt means 40% off of the total price.”