Pre-Algebra Demystified

EXAMPLE Divide^56 ^23 : SOLUTION 5 6  2 3 ¼ 5 6  3 2 1 ¼ 5 6  3 2 2 ¼ 5 4 ¼ (^114) PRACTICE Divide: 1. 5 8  1 4 2. 7 10  2 ...

Division of Mixed Numbers To divide mixed numbers, change them into improper fractions, invert the fraction after the division s ...

PRACTICE Divide: 7^12  (^334) 1^18  5121 6^35  2107 9^13  (^458) 4^25  1109 ANSWERS 2 2. 27 122 3. 2^49 4. 2 ...

The plumber would need a piece of pipe at least 25^1724 inches long. EXAMPLE It takes Bill 2^34 hours to cut a lawn. It takes Wa ...

SOLUTION Divide: 240  712 ¼ 240  15 2 16 ¼ 240 1  2 15 1 ¼ 16  2 ¼32 cubic feet Hence, the tank will hold about 32 cubic fee ...

Comparing Fractions To compare two or more fractions:  Step 1 Find the LCD of the fractions.  Step 2 Change the fractions to h ...

4. 8 9 5. 2 3 Operations with Positive and Negative Fractions Every fraction has three signs: the sign of the number in the nume ...

SOLUTION
11 12
3 8 ¼
11 12
3 8 ¼
22 24
9 24 ¼
22
9 24 ¼
31 24 ¼
31 24 ¼
1247 EXAMPLE Multiply^38 
^49
 : ...

PRACTICE Perform the following indicated operations: 1.
1 2 þ
3 4  þ 2 3 2. 9 10

3 5  3. 1 8 
5 6  
4 5  4. 13 ...

(c) 1^1324 (d) 2^18 Subtract 109
^56. (a) 1 15 (b) 7 60 (c) 1 (d) 11 30 Multiply^56 ^1315. (a) 18 23 (b) 13 18 (c) 17 24 ( ...

(c) 12 125 (d) 11 247 Subtract 15^29
6125. (a) 8^2936 (b) 9 127 (c) 8 367 (d) 9^1112 Multiply 3^18  256. (a) 6 485 (b) 5^ ...

10. 5 12  2 3 þ 178 : (a) 3 247 (b) 4^38 (c) 2^1172 (d) 1^56 Find the cost of 2^14 lbs of bananas at 60¢ per pound. (a) 125¢ ( ...

Which fraction is the smallest: 5 16 ; 3 8 ; 1 4 ; 1 3 ? (a) 5 16 (b) 3 8 (c) 1 4 (d) 1 3 Add
7 8 þ
3 5  þ 9 10 . (a) 2^ ...

Divide
678 
(^212)
 . (a)
(^316) (b) 12^18 (c) 17 163 (d) 2^34 Perform the indicated operations: 6^14 þ
2 3   (^1 ...

CHAPTER 5 Decimals Naming Decimals As with whole numbers, each digit of a decimal has aplace value. The place value names are sh ...

EXAMPLE Name 0.6235. SOLUTION First write in words 6235, and then write the place value of the five after it: Six thousand two h ...

Rounding Decimals Decimals are rounded the same way as whole numbers are rounded. To round a decimal to a specific place value, ...

Math Note: Zeros can be affixed to the end of a decimal on the right side of the decimal point. For example, 0.62 can be written ...

ANSWERS 1. 11.462 2. 170.471 3. 730.22 4. 61.1036 5. 4459.072 Subtraction of Decimals Subtracting decimals is similar to adding ...

ANSWERS 1. 5.232 2. 84.12 3. 0.2089 4. 4.35 5. 2.22065 Multiplication of Decimals To multiply two decimals, multiply the two num ...