Download Math Homework Help for 7

Math Homework Help for 6.1 f ☺
Tuesday & Wednesday:
Students will be learning how to find the multiples of a number and
finding the least common multiple of 2 numbers.
The following are some examples. 
FINDING MULTIPLES:
Circle each number that has a 8 as a multiple.
10
8
36
24 100 12 64 56
To find the answer just make a list of the multiples of 8 (or use division).
8 x 1 8 x 2 8 x 3 8 x 4 8 x 5 8 x 6 8 x 7 8 x 8 8 x 9 8 x 10
8
16
24
32
40
48
56
64
72
80
so far we would circle 8, 24, 64, and 56. But what about 100?
Just divide 8 into 100. If it comes out evenly without any leftover numbers
then 100 is a multiple also!
Divide 100 by 8
Answer is not even. There is still a
remainder of 4 that would make
us have to use a decimal. So 100
is NOT a multiple of 8.
ANSWER: Only multiples of 8 in the question are 8, 24, 64, and 56
LEAST COMMON MULTIPLE:
What is the least common multiple of 12 and 9?
Just multiply like in question number 1 except do it for both numbers.
1 x 12 2 x 12 3 x 12 4 x 12 5 x 12 6 x 12……
12
1x9
9
24
36
48
60
2x9 3x9 4x9
18
27
36
5x9
45
72
6 x 9……
54
What is the smallest multiple they have in common?
12: 12
9:
24
9
18
36
27
48
60
36
45
72
54
ANSWER: 36 is the smallest multiple they have in common! 
ALTERNATIVE METHOD:
You can also find the LCM by using the Cake or Tree Method of
Prime Factorization and find the primes the two numbers have in common
and multiplying them!
1
3 3
2 6
2 12
Prime Factors of
1
3 3
3 9
12: 2 x 2 x 3
9: 3 x 3
Common: are two 3’s which becomes one 3
Multiply 3 time all the extra numbers we
have
3 x 3 x 2 x 2 = 36