Common Denominator
We have two fractions, 3/4 and 4/12. Write the new fractions with the same denominator.
9/12 and 4/12
Solve: 4/8 + 1/8
4/8 + 1/8 = 5/8
There are two people and they want five brownies. How much brownie will each person get?
2 1/2 Brownies
Write an equivalent expression for: X + X + 4 + 4
2x + 8
2(x) + 2 (4)
2 (x + 4)
What does GEMDAS stand for?
Grouping
Exponents
Multiplication or Division
Addition or Subtraction
What is the least common denominator for 3/5 and 2/4?
20
Solve: 2/3 + 4/6 =
8/6 or 1 2/6 or 1 1/3
There are three people and they want to share 4 pizzas. How much pizza will each person get?
1 1/3 pizzas
Write an equivalent expression for: 3(x+3)
3x + 9
3(x) + 3(3)
x + x + x + 3 + 3 + 3
What does an equation have that an expression does not?
An equal sign
Find the common denominator of 2/3 and 5/5 by writing out the multiples of the denominators.
Multiples of 3 -
Multiples of 5 -
New Fractions -
3 - 3, 6, 9, 12, 15
5 - 5, 10, 15
10/15 + 15/15
Solve 1/2 + 1/3 + 1/4
13/12 OR 1 1/12
If there were 3 people and 2 pies. How many pieces should you cut each pie into? How much would each person get?
Thirds
2/3 of a pie
Write the expression for: Mary has 3 goats. Charles has twice as many goats as Mary.
2(3)
2 x 3
A student finished 8 of her homework problems in class. If the ratio of problems she finished to problems she still had left was 4:1, how many homework problems does she have left to finish?
4:1 = 8:2
2 problems
2/3 and 5/8
Write these fractions with 24 as the denominator.
16/24 and 15/24
Solve the expression: 2 - 1/4 + 1/2
2 1/4
There are five cupcakes and 3 people to eat them. How much cupcake will each person get?
1 2/3 or 5/3 cupcakes
2 (5 + 2)
Write this expression in words.
Two times the sum of five and two
The sum of five and two multiplied by two
Two groups of five plus two
If the ratio of dogs to cats is 3:2. How many dogs will there be if there are 8 cats?
12 dogs
Find the first three common denominators for 2/4 and 4/6.
12, 24, 36
1/2 + (4/6 + 1/6)
1/2 + (4/6 + 1/6)
1/2 + (5/6)
3/6 + 5/6 = 8/6 OR 1 2/6
There are 6 brownies and everyone gets 1 1/2 brownies. How many people are there?
4 people
Which expression is equivalent to 5X + 5
A) 3 + X + 1 + 2X + 2X + 1
B) 5( X + 2)
C) 2X + 8
A) 3 + X + 1 + 2X + 2X + 1
Solve: 1/3 X 1/2
1/6