Quiz #1 (1.1-1.9) Name:__________________
Math 102
1. Simplify
3
5 2
⋅
. 2. Multiply: 1
(24)
4
3. Simplify:
( )
1
2 6
2
x
− − +
3
5 2 5 8 40
⋅ = ⋅ = 1 24
(24) 6
4 4
= =
( )
1 1 1
2 6 2 6 3
2 2 2
x x x
− − + = ⋅ − ⋅ = −
4. Simplify:
18
6
−
−
5. Simplify:
5
10
6
÷
6. Simplify:
6 1
4 ( 5)
− −
− −
18
3
6
−
=
− 5
10 10
6
÷ = 26
5
⋅
12
=
6 1 7
4 ( 5) 9
− − −
=
− −
5 6 60
10 10 12
6 5 5
or
÷ = ⋅ = =
7. Factor 620 into prime numbers. 8. Reduce:
63
210
620
62 10 63 3
210 =3 7⋅ ⋅
2 3⋅5 7⋅ ⋅
3
10
=
2 31 2 5
620 2 2 5 31
= ⋅ ⋅ ⋅
9. Find the least common denominator (LCD) and add:
19 13
42 70
+
LCD: _________
42 2 3 7 and 70 2 5 7 so the LCD is 2 3 5 7 210
= ⋅ ⋅ = ⋅ ⋅ ⋅ ⋅ ⋅ =
Answer: _______
19 13 5 19 3 13 95 39 134 67
42 70 5 2 3 7 3 2 5 7 210 210 210 105
+ = + = + = =
⋅ ⋅ ⋅ ⋅