UNIT 7 Personal 1313 Financial Taxes, Interest, and ...

UNIT 7

Personal Financial Literacy

13 MMOODDUULLEE

Taxes, Interest, and Incentives

7.13.A, 7.13.E, 7.13.F

14 MMOODDUULLEE

Planning Your Future

7.13.B, 7.13.C, 7.13.D

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CAREERS IN MATH

Freelance Computer Programmer A computer programmer translates commands into code, a language that a computer understands. Programmers work on a variety of tasks, from creating computer games to testing software. A freelance programmer doesn't work for a specific company; this gives the freelancer more flexibility with his or her work schedule. Computer programmers use mathematical logic when writing or altering code.

If you are interested in a career as a computer programmer, you should study these mathematical subjects:

? Algebra ? Geometry ? Trigonometry ? Calculus ? Discrete Math

Research other careers that require the understanding of mathematical logic.

Unit 7 Performance Task

At the end of the unit, check out how a freelance computer programmer uses math.

Unit 7 399

UNIT 7

Vo ca b u l a r y

Preview

Use the puzzle to preview key vocabulary from this unit. Unscramble the circled letters within found words to answer the riddle at the bottom of the page.

S T E S S A Y N F NMB S K U MY J I R Z KW I QC E H Y F F S R NDNMR J A S V F C A S K K S P S OD A NW J I Z R A F B P EMK C E BWHQ EM OR Z R PAUPVNKHQBO I V N P B G X N E C ZWO U R NG P GME N R J A K Z X D P P E ZMDD C E C A U K L G X HQT E L I AB I L I T I E S C K XWN T U L J G C B Y T K MI PCOKYGKTUCUC L F G O K P R J WW K R Y R D L CMG J QU T P PWUN A B Z E Y FMC T L H Y E H SMU C

? The things you own that have a positive cash value. (Lesson 14.3) ? The amount of money you earn. (Lesson 14.1) ? A plan for managing your money to help you reach your financial goals. (Lesson 14.1) ? Debts you owe that have a negative cash value. (Lesson 14.3) ? Expenses that occur regularly and stay the same (2 words). (Lesson 14.1) ? The difference between assets and liabilities (2 words). (Lesson 14.3)

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Q: What did the fisherman give to the IRS?

A: His

!

400 Vocabulary Preview

Taxes, Interest, and Incentives

? ESSENTIAL QUESTION

How can you solve realworld problems involving taxes, interest, and incentives?

13 MODULE

LESSON 13.1

Calculating Sales and Income Tax

7.13.A

LESSON 13.2

Calculating and Comparing Simple and Compound Interest

7.13.E

LESSON 13.3

Making Purchasing Decisions

7.13.F

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my.

Real-World Video

You can invest money in savings accounts, certificates of deposit (CDs), and bonds. Each type of investment earns simple or compound interest, so your money grows over time.

my.

my.

Go digital with your write-in student

edition, accessible on any device.

Math On the Spot

Scan with your smart phone to jump directly to the online edition, video tutor, and more.

Animated Math

Interactively explore key concepts to see how math works.

Personal Math Trainer

Get immediate feedback and help as

you work through practice sets.

401

Are YOU Ready?

Complete these exercises to review skills you will need for this chapter.

Percents and Decimals

Personal Math Trainer

Online Assessment and my. Intervention

EXAMPLE

125% = 100% + 25%

=

_1_00_ 100

+

_2_5_ 100

= 1 + 0.25

= 1.25

Write the percent as the sum of 1 whole and a percent remainder. Write the percents as fractions. Write the fractions as decimals.

Simplify.

Write each percent as a decimal.

1. 45%

2. 91%

Write each decimal as a percent.

5. 0.79

6. 0.8

Decimal Operations

EXAMPLE 25.9 - 3.24 25.90 - 3.24

22.66

3. 8% 7. 0.05

4. 111% 8. 1.98

To add or subtract decimals, align the decimal points. Add zeros if necessary.

Find each sum or difference. 9. 11.9 - 7.6

12. 6.04 - 3.5

10. 24.1 - 9.25 13. 5.17 - 5.09

11. 45 - 10.6 14. 100 - 3.77

Multiply with Fractions and Decimals

EXAMPLE

5.9 ? 3.6 3 5 4 + 1 7 7 2 1.2 4

Multiply as you would with whole numbers. Count the total number of decimal places in the two factors.

Write the same total number of decimal places in the product.

Multiply.

15. 2.77 ? 24

16. 9.95 ? 0.7

17. 12.04 ? 3.2

18. 38.4 ? 0.72

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402 Unit 7

Reading Start-Up

Visualize Vocabulary

Use the words to complete the graphic. You will put a different word in each box.

Money employers deduct from wages:

Taxes due on April 15 of each year:

Understanding Taxes

Percent of the total cost of goods sold:

Income that is taxed:

Understand Vocabulary

Complete each sentence using the preview words. 1. The amount of money earned by bank customers based on the amount of principal in their savings account is

Vocabulary

Review Words

deductions (deducciones) federal withholding

(retenci?n fiscal federal) gross pay (paga bruta) income tax (impuesto sobre la renta) net pay (paga neta) principal (capital) sales tax (impuesto sobre la venta) taxable income (ingreso sujeto a impuestos) unit price (precio por unidad)

Preview Words

compound interest (inter?s compuesto) interest (inter?s) simple interest (inter?s simple)

.

2.

is interest paid only on the principal,

according to an agreed upon interest rate.

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Active Reading

Tri-Fold Before beginning the module, create a tri-fold to help you learn the concepts and vocabulary in this module. Fold the paper into three sections. Label the columns "What I Know,""What I Need to Know," and "What I Learned." Complete the first two columns before you read. After studying the module, complete the third column.

Module 13 403

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