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Rounding Round to the nearest whole number 3.46 Round to the nearest whole number 3.46 Round to the nearest cent $19.9357 Round to the nearest cent $19.9357.

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Presentation on theme: "Rounding Round to the nearest whole number 3.46 Round to the nearest whole number 3.46 Round to the nearest cent $19.9357 Round to the nearest cent $19.9357."— Presentation transcript:

1 Rounding Round to the nearest whole number 3.46 Round to the nearest whole number 3.46 Round to the nearest cent $19.9357 Round to the nearest cent $19.9357 Round to the nearest tenth 257.99 Round to the nearest tenth 257.99 Round to the nearest dollar $14.13 Round to the nearest dollar $14.13 Round to the nearest hundredth 0.9912 Round to the nearest hundredth 0.9912 Round to the nearest thousandth 17.6295 Round to the nearest thousandth 17.6295 3 $19.94 258 $14.00 0.99 17.630

2 Simple Interest Lesson 8-6 Solve problems involving simple interest.

3 Simple Interest What is interest?? Words to know: Simple Interest- the amount paid or earned for the use of money. Principal- the amount of money deposited or invested.

4 To find simple interest we use the following formula: I = prt Interest Principal Interest rate written as a decimal The amount of time the money is invested or borrowed (years)

5 Find the interest earned Ray has $750 in a savings account that pays 3% simple interest. How much interest will he earn in 4 years? Ray has $750 in a savings account that pays 3% simple interest. How much interest will he earn in 4 years? I = 750 x 3% x 4 Ray will earn $90 interest in 4 years.

6 Find the interest paid Cory borrows $1,200 from the bank for a riding lawn mower. The interest rate is 8% per year. How much simple interest will he pay if he takes 2 years to repay the loan? Cory borrows $1,200 from the bank for a riding lawn mower. The interest rate is 8% per year. How much simple interest will he pay if he takes 2 years to repay the loan? I = 1,200 x 8% x 2 Cory will pay $192 interest in 2 years.

7 Find the interest earned. Kates bank offered 4% simple interest on her deposit. She has $1,500 to invest. How much interest will she earn in 30 months? Kates bank offered 4% simple interest on her deposit. She has $1,500 to invest. How much interest will she earn in 30 months? 30 months is how many years? 30/12 = 2.5 years I = 1,500 x 4% x 2.5 Kate will earn $150 interest in 30 months.

8 Find the total paid Henry charged $600 TV on his credit card with an interest rate of 21%. How much money will he owe after 9 months. Henry charged $600 TV on his credit card with an interest rate of 21%. How much money will he owe after 9 months. 9 months is how many years? 9/12 =.75 years I = 600 x 21% x.75= $94.50 interest Amount paid $600 + $94.50 = $694.50

9 Try these Allison charged a $30 handbag on her credit card with an interest rate of 8%. How much money would she pay after 6 months? Allison charged a $30 handbag on her credit card with an interest rate of 8%. How much money would she pay after 6 months? Marcus has $1,800 dollars from his summer job to invest. If he invest in a savings for 3 years at a rate of 5.25%. How much interest will he earn? Marcus has $1,800 dollars from his summer job to invest. If he invest in a savings for 3 years at a rate of 5.25%. How much interest will he earn? $31.20 $283.50

10 Practice / Homework Complete page 584 lesson 8-6 # 2- 12 evens Complete page 584 lesson 8-6 # 2- 12 evens Homework: Lesson 8-6 # 1-16 all Homework: Lesson 8-6 # 1-16 all


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