1. lesson 30.notebook November 27, 2012
Assignment:
1-->Set 30 (evens) - Due Tomorrow (11/28)
2-->Test #5 - Tuesday (12/4)
3-->Test #4 signed??
1

2. lesson 30.notebook November 27, 2012
Lesson 30 WarmUp:
1) Find the unknown number: 24x = 480
2) Simplify: 7 x 11 x 13
3) Estimate: 4963 39
4) What type of angle is formed by the hands of a
clock at 2:00 pm?
5) When 5 months have passed, what fraction of the
year remains?
2

3. lesson 30.notebook November 27, 2012
Lesson 30:
*least common multiple (LCM) - the smallest number that is a common multiple of 2
or more numbers
Find the LCM:
2:
5:
LCM-->
*reciprocal - the inverse of a fraction
--The product of a fraction and its reciprocal is always equal to 1
ex-->
3

4. lesson 30.notebook November 27, 2012
Lesson 30 Examples:
Find the LCM of the following sets of numbers:
A) 6-->
8-->
LCM-->
B) 3-->
5-->
LCM-->
C) 5-->
10-->
LCM-->
4

5. lesson 30.notebook November 27, 2012
Write the reciprocal of each number:
D) 2/3
E) 8/5
F) 6
G) 1/5
5

6. lesson 30.notebook November 27, 2012
Find the number that makes each equation true.
H) 3/8 x ? = 1
I) 4 x ? = 1
J) ? x 1/6 = 1
K) ? x 7/8 = 1
6

7. lesson 30.notebook November 27, 2012
L) How many 2/5's are in 1?
M) How many 5/12's are in 1?
7