Calculating Sale Prices: Understanding Discount Percentages for 5th Grade Students
This warm-up exercise focuses on calculating sale prices based on discounts for 5th-grade students. Students will practice how to determine sale prices by converting percentage discounts into decimal form and applying these to original prices. Examples include computing the sale price of a laptop, cell phone, and digital camera after a percentage decrease. This activity emphasizes rounding to the nearest hundredth when dealing with money, enhancing both mathematical skills and financial literacy.
Calculating Sale Prices: Understanding Discount Percentages for 5th Grade Students
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Presentation Transcript
Daily Warm-Up (I do)ALCOS # 3 5th grade A laptop computer originally cost $679.00. Its cost decreased 25%. What is the sale price of the laptop not including tax?
Solution To find “percent of” any number, change the percent to decimal form, then multiply by the original number. 25% becomes .25 (move decimal point 2 places to the left and take off the percent sign) Multiply .25 x 679.00 = $169.75 Then subtract discounted amount from the original price. $679.00-169.75 = $509.25 sale price.
Note: • If you are dealing with money and your decimal answer is longer than the hundredths place you will have to round the decimal number to the hundredths place before continuing.
Daily Warm-Up (we do) • A new cell phone originally cost $189.00. Its cost decreased 35%. • What is the sale price of the cell phone, not including tax?
Solution • Change 35% to decimal • .35 • Multiply .35 x 189.00 = • 66.15 • Subtract $189.00 - $66.15 = $122.85
Daily Warm-Up (You Do) • A digital camera originally cost $59.95. Its cost decreased 15%. • What is the sale price of the camera, not including tax?
Solution • .15 X 59.95 = • 8.9925 • Round 8.9925 to the nearest hundredth – • 8.99 • $59.95 – 8.99 = • $50.96
