CHAPTER 7 / ESSENTIAL PRE-ALGEBRA SKILLS 279
Simplify the following expressions:
- __ 2.
3. __ 4. __
5. __ 6.
__
7. __ 8. __
9. __10. __ 11. __ 12. __
Convert each expression to a fraction:
- 25% =__ 14. 0.20 =__ 15. 10% =__ 16. 0.333... =__
- How do you divide a number by a fraction?
__________________________________________________________________________________________________- How do you add two fractions by “zip-zap-zup”?
__________________________________________________________________________________________________- What can be canceled to simplify a fraction?
__________________________________________________________________________________________________- How do you convert a fraction to a decimal?
__________________________________________________________________________________________________- If a class contains 12 boys and 15 girls, then what fraction of the class is boys? 21. __
- If 2/3 of a class is girls, and there are 9 boys in the class, what is the total
number of students in the class? 22. __ - If mand nare positive, and m< n,then what is true about? 23. __
m
n
69
12
n
n+
=
x
x(^225)
5
−
−
(^3) =
42
−=
(^1) x
2
1
3
1
4
++ =
−÷=
2
9
4
x^23 x12 4
84
m
m+
+
=
3
2
9
8
xz=
4
7
2
3
+=
x2
9
5
4
÷=
56
21
=
5
2
3
8
=
1
7
2
5
+=
Concept Review 3: Fractions