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**Section 7.1 Math Fundamentals**

Marketing Essentials n Chapter 7 Basic Math Skills Section 7.1 Math Fundamentals

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**Math Fundamentals SECTION 7.1**

What You'll Learn How to write numbers in words using commas and hyphens How to understand fractional amounts How to perform basic math operations with decimal numbers How to round numbers, especially amounts of money How to convert fractions to decimal equivalents

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**Math Fundamentals SECTION 7.1**

Why It's Important Virtually every job in the fields of marketing and business requires a good understanding of math fundamentals. Many young people need a review of basic math skills to provide a good foundation in math. In this section, you will have an opportunity to sharpen your math skills.

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**Math Fundamentals SECTION 7.1 digits fractions numerator denominator**

Key Terms digits fractions numerator denominator mixed numbers decimal number

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**Math Fundamentals SECTION 7.1 Writing Whole Numbers**

Whole numbers can be written without fractions or decimals. To read a whole number or write it in words, follow these five steps: Separate the number into groups of three digits: units, thousands, and millions. Separate the groups with commas. Never use the word "and". Use hyphens in numbers less than 100 that are written as two words. When a three-digit group is made up of only zeros, do not write the name of the group.

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**Math Fundamentals SECTION 7.1 Fractions**

Fractions are numbers used to describe a part of some standard amount. The numerator is the top number. It represents the number of parts. The denominator is the bottom number. It represents how many parts are in the whole.

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**Math Fundamentals SECTION 7.1 Decimals**

A decimal number is a fraction or mixed number whose denominator is a multiple of 10. To read or write a decimal number, follow these steps. Use as an example. 1. Begin with the whole number to the left of the decimal point (fifteen). 2. Read or write "and" for the decimal point. 3. Read or write the number to the right of the decimal point as a whole number (eighty-three). Slide 1 of 2

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**Math Fundamentals SECTION 7.1 Decimals**

4. Use the name of the decimal place of the final digit (thousandths). The result is fifteen and eighty-three thousandths. You may also hear decimal numbers spoken using the whole number and only the names of the digits in the decimal places, with "point" for the decimal point. For example, might be spoken as "fifteen point zero eight three". Slide 2 of 2

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**Math Fundamentals SECTION 7.1 Adding and Subtracting Decimal Numbers**

To add or subtract decimal numbers, first list the numbers vertically, keeping the decimal points in line with each other. Then add or subtract as you would with whole numbers. Sometimes you may need to write zeros to fill a column. Align decimal points vertically. 1.45 + 3.40 4.85 = ? Write 0s as needed. Add as with whole numbers.

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**Math Fundamentals SECTION 7.1 Rounding Decimal Numbers**

1. Find the decimal place to which you are rounding. 2. Look at the digit to the right of that place. 3. If the digit is less than 5, leave the first digit as is. If the digit is 5 or greater, round up.

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**Math Fundamentals SECTION 7.1 Dividing Decimal Numbers**

1. Set up the division problem as you would with whole numbers. 2. Shift the decimal point in the divisor so that the divisor becomes a whole number. Shift the decimal point in the dividend the same number of decimal places. 3. Place the decimal point in the answer space directly above its new position in the dividend. 4. Divide as you would with whole numbers.

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**Math Fundamentals SECTION 7.1 Converting Fractions to Decimals**

To convert any fraction to a decimal, simply divide the numerator by the denominator. Numerator 0.25 1.00 8 20 1 4 = 1 ÷ = 4 Denominator

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**Reviewing Key Terms and Concepts**

ASSESSMENT 7.1 Reviewing Key Terms and Concepts 1. Write the whole number 2,000,265 in words, using commas and hyphens correctly. 2. Explain the meaning of 3/5. 3. Multiply: $4.99 x 5 4. Round the answer from question 3 to the nearest dollar. 5. Convert the fraction 3/4 to its decimal equivalent.

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**ASSESSMENT Thinking Critically 7.1**

Sometimes rounding decimal numbers to whole numbers makes a complicated math problem easy to do "in your head." Name at least one example when rounding is helpful.

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**Decimal placement name**

7.1 Graphic Organizer Understanding Decimal Numbers Hundreds Tens Ones Tenths Hundredths Thousandths Ten Thousandths Decimal point Decimal placement name

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Marketing Essentials End of Section 7.1

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