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Chapter 1 Section 4

Chapter 1 Section 4. Decimal Notation. Fractions and Decimals. To write a fraction as a decimal, use long division to make the conversion or use your calculator. . Adding or Subtracting Decimals. To add or subtract two decimals, use column notation and line up the decimal points.

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Chapter 1 Section 4

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  1. Chapter 1 Section 4 Decimal Notation

  2. Fractions and Decimals • To write a fraction as a decimal, use long division to make the conversion or use your calculator.

  3. Adding or Subtracting Decimals. • To add or subtract two decimals, use column notation and line up the decimal points. • Add or subtract the numbers as you would whole numbers. • Write the decimal point in the result directly below the decimal points in the problem. • Or, use your calculator 

  4. Multiplying Decimal Numbers • Multiply the numbers as if they were whole numbers by using column notation and ignoring the decimal points. • Place the decimal point in the answer so that the result has the same number of decimal places as the sum of the decimal places in each factor. • The product of two positive or two negative numbers is a positive number. The product of a positive and a negative number is a negative number. • Or, use your calculator 

  5. Your Turn (calculator)

  6. Your Turn(calculator)

  7. Your TurnEvaluate for the given values (review how to STO)

  8. Activity #1 • We are going to work a problem on a separate sheet that is an in class group activity. These activities count as a quiz in the grade book. • Form into groups of three. Take a minute and introduce yourself and tell the person how much you like math  • We will take about three minutes or so to work on the problem solo, then as a group. It is OK if you don’t get it right away!!

  9. The Bread Problem • In 1902 you could buy 44 loaves of bread for the cost of 1 loaf in 2006. If a loaf a bread in 2006 cost $1.72 more than a loaf in 1902, what was the price of a loaf of bread in 1902?

  10. Algebra! • In Chapter 2 we will develop a method to solve these types of problems. Stay calm 

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