GCF/LCM
What are the common factors of 8 and 20?
1, 2, 4,
What is the first step when solving an addition or subtraction problem with fractions?
Find a common denominator.
5 2/5 + 9 1/4
14 13/20
5/8 x 12/25 =
3/10
1 7/8 + 5/6 x 2/8 =
1 26/24 = 2 2/24
What is the GCF of 10 and 15?
5
What is the first step in solving a multiplication or division problem using mixed numbers.
Change all of the mixed numbers into improper fractions.
24 7/8 + 13 =
37 7/8
9 1/3 x 14 =
392/3 = 130 2/3
9 - 3/8 + 4 1/3 - 2 5/6 =
10 3/24
What are the first 5 common multiples of 4 and 5?
20, 40, 60, 80, 100
What is it very important to do when dividing fractions?
To reciprocate what is being divided.
34/10 + 9/5 + 28/ 20 =
132/20 = 6 3/5
18 3/5 divided by 3 =
31/5 = 6 1/5
What is the definition of a factor and a multiple?
A factor is a number that evenly divides into two numbers.
A multiple is a number that 2 or more numbers can divide into evenly.
What is the GCF and the LCM of 8 and 12?
GCF is 4 and LCM is 24
What is the final step in adding, subtracting, multiplying, and dividing fractions?
Simplify the answer to the lowest terms.
87 - 29 6/7 =
57 1/7
4/5 divided by 20/35 =
7/5 = 1 2/5
Review - What is 3 x 108?
300,000,000
Define factors.
Define multiples.
Multiples - numbers that multiply evenly into other numbers.
What are the steps in Order of Operation.
Parenthesis, Exponents, Multiplication or Division from left to Right, Addition or Subtraction from left to Right
8 1/5 - 6 6/7 =
1 12/35
5/9 x 4/5 x 6/12 x 8/2 =
4/9
What is a mixed number?
What is an improper fraction?
A mixed number is a combination of a whole number and a fraction.
An improper fraction is when the numerator is bigger than the denominator.