DISCOUNTS WEEK 13
DO NOW (3 MINS) Topic: PKB (PRIOR KNOWLEDGE BOX) Discounts Misconceptions Complete this side only. List anything that you know about the above topic.
STANDARD 7 N. S. 1. 7 SOLVE PROBLEMS THAT INVOLVE DISCOUNTS, MARKUPS, COMMISSIONS, AND PROFIT AND COMPUTE SIMPLE AND COMPOUND INTEREST.
OBJECTIVE HUSKIES WILL BE ABLE TO CALCULATE THE DISCOUNT OF A QUANTITY.
YOU BUY A PAIR OF JEANS AT H&M THAT IS 33% OFF THE ORIGINAL PRICE OF $29. WHAT IS THE SALE PRICE? Intro
VOCABULARY • Discount: A ____or amount of decrease in the price of an item. • Sale price = original price - ______
KEY INFORMATION • % OF A NUMBER • % X THE NUMBER EXAMPLE 30% OF $60 = 0. 30(60) = $18 SALE = ORIGINAL-DISCOUNT = $60 -$18 = $42
EXAMPLE#1 The original price of a shirt is $18. The shirt is on sale for a 20% discount. What is the sale price of the shirt?
LET’S TRY
SOLUTION Discount = 20% of $18 Find the amount of discount. = 0. 20(18) = 3. 60 Sale price = original price - discount Use formula to find sale price. = 18 - 3. 60 = 14. 40 ANSWER The sale price of the shirt is $14. 40.
TRY THIS! Find the sale price. Original Price: $40 Percent Discount: 30%
AND THIS! Find the sale price. Original Price: $75 Percent Discount: 25%
PRACTICE PROBLEMS Original price of concert tickets: $100. 00 Discount: 21%
PRACTICE PROBLEMS Original price of a book: $18. 50 Discount: 45%
PRIOR KNOWLEDGE BOX (PKB) Topic: Discounts Misconceptions What did you think you knew but you found out was a misconception? If you didn’t have any prior knowledge, what did you learn/ review today?
SO WHAT DOES IT LOOK LIKE ON THE CAHSEE? 19. A pair of jeans regularly sells for $24. 00. They are on sale for 25% off. What is the sale price of the jeans? A B C D $6. 00 $18. 00 $20. 00 $30. 00 20. A CD player regularly sells for $80. It is on sale for 20% off. What is the sale price of the CD player? A B C D $16 $60 $64 $96
EXIT SLIP- DISCOUNTS • Name • Date • Period
AGENDA Homework-5 word problems (percent decrease/increase) Find the sale price… Original price of a camera: $554. 99 Discount: 48% Bring a white board marker (DUE: P. 1, 3, 5 - Mondays and Thursday. P. 2, 4, 6 Tuesdays and Fridays)