Pre-Algebra Demystified
PRACTICE Multiply: 17.826.3 321.22.03 0.0030.06 5.02 0.4 723.40.615 ANSWERS 1. 112.266 2. 652.036 3. 0.00018 4. 2.008 5. ...
EXAMPLE Divide 38.27 by 43. SOLUTION : 89 43 Þ 38 : 27 344 387 387 0 Sometimes it is necessary to place zeros in the quotient. E ...
CHAPTER 5 Decimals 91 EXAMPLE Divide 18 by 0.375. SOLUTION 0 : 375 Þ 18 Move the point three places to the right after annexing ...
EXAMPLE Arrange the decimals 0.63, 0.256, 3.1, and 0.8 in order of size, smallest to largest. SOLUTION 0 : 630 630 0 : 256 256 3 ...
EXAMPLE Normal body temperature is 98.6 8 F. If a man has a fever and his temperature is 101.2 8 F, how much higher is his tempe ...
3. $56 6.05 ml $2,563.80 Changing Fractions to Decimals A fraction can be converted to an equivalent decimal. For example^14 ¼ ...
CHAPTER 5 Decimals 95 EXAMPLE Change 113 to a decimal. SOLUTION : 2727 11 Þ 3 : 0000 22 80 77 30 22 80 Hence, 113 ¼0.2727... The ...
PRACTICE Change each of the following fractions to a decimal: 1. 3 8 2. 1 6 3. 11 20 4. 5 12 5. 4^13 ANSWERS 1. 0.375 2. 0.1 6 3 ...
SOLUTION 0 : 45 ¼ 45 100 ¼ 9 20 Hence, 0.45¼ 9 20 . EXAMPLE Change 0.0035 to a fraction. SOLUTION 0 : 0035 ¼ 35 10,000 ¼ 7 2,000 ...
The numbers that include the fractions and their equivalent terminating or repeating decimals are calledrational numbers. Rememb ...
Hence,^34 þ0.8¼ 11120 : EXAMPLE Multiply 109 0 : 75 : SOLUTION 9 10 ¼ 0 : 9 0 : 9 0 : 75 ¼ 0 : 675 ALTERNATE SOLUTION 0 : 75 ...
2.5 or 2^12 1.25 or 1^14 Operations with Positive and Negative Decimals When performing operations with decimals that are posi ...
4. 18.27( 3 :5) 5. 4.510.95 ANSWERS 1. 15.37 2. 1.46 3. 10.915 4. 14.77 5. 6.45 Quiz In the number 2.637945, the place ...
Multiply 5.60.024. (a) 0.1344 (b) 0.1286 (c) 0.1592 (d) 0.3714 Multiply 0.0020.009. (a) 0.000018 (b) 0.0018 (c) 0.00018 (d) 0 ...
Change 165 to a decimal. (a) 3.2 (b) 0.625 (c) 0.3125 (d) 0.475 Change 117 to a decimal. (a) 0.6 3 (b) 0.636 (c) 0. 63 (d) 0.63 ...
Multiply^56 0.3. (a) 1 4 (b) 0.75 (c) 15 6 (d) 2.5 Subtract 1.237( 0 :56). (a) 0.677 (b) 1.797 (c) 1.797 (d) 0.677 Divid ...
CHAPTER 6 Percent Basic Concepts Percent means hundredths. For example, 17% means 10017 or 0.17. Another way to think of 17% is ...
It should be pointed out that 100% means^100100 or 1. Changing Percents to Decimals To change a percent to a decimal, drop the p ...
SOLUTION 0.2%¼0.002 PRACTICE Write each of the following percent values as a decimal: 26% 3% 125% 16.6% 0.8% ANSWERS 0.26 0.0 ...
EXAMPLE Write 1.29 as a percent. SOLUTION 1.29¼129% EXAMPLE Write 0.682 as a percent. SOLUTION 0.682¼68.2% EXAMPLE Write 0.0051 ...
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