Page 238 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank. Not all choices will be used.

a a - c a + c a
least common denominator (LCD) like - -
b b b -b
perimeter unlike equivalent

9 13 3 1
1. The fractions and are called fractions while and are called
11 11 4 3
fractions.
a c a c
2. + = and - = .
b b b b
-a a
3. As long as b is not 0, = = .
b -b

4. The distance around a figure is called its .
5. The smallest positive number divisible by all the denominators of a list of fractions is called the
.
6. Fractions that represent the same portion of a whole are called fractions.

State whether the fractions in each list are like or unlike fractions.

7 7 2 4 9 1 8 2
7. , 8. , 9. , 10. ,
8 10 3 9 10 10 11 11

2 30 19 3 3 3 5 7 12 1 2 4
11. , , 12. , , 13. , , 14. , ,
31 31 31 10 11 13 12 12 11 5 5 5

3.4 Exercise Set FOR EXTRA HELP

Objective Add and simplify. See Examples 1 through 3, and 6.
1 2 9 2 1 1 1 1
1. + 2. + 3. + 4. +
7 7 17 17 10 10 4 4

2 4 3 2 6 1 1 3
5. + 6. + 7. - + 8. - +
9 9 10 10 20 20 8 8

3 4 5 7 10 3 13 9
9. - + a- b 10. - + a- b 11. + 12. +
14 14 24 24 11 11 17 17

4 2 1 5 1 2 7 3 2 7 3 1
13. + + 14. + + 15. - + + 16. - + +
13 13 13 11 11 11 18 18 18 15 15 15

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