Ratios and Rates
Colon, fraction, "to"
What do you have to do when dividing fractions?
Keep, Change, Reciprocal (flip)
Percents are out of what number?
100
What does PEMDAS stand for?
Parenthesis, exponents, multiplication, division, addition, subtraction
How do you solve equations?
There are three red cars for every two blue cars. What is the ratio of blue cars to red cars?
2:3, 2/3, 2 to 3
What makes a number prime?
A number that is only divisible by 1 and itself.
What is 50% as a fraction?
Simplify your answer!
50/100 = 1/2
What is the difference between expressions and equations?
Expressions do NOT have an equal sign, equations do.
x + 3 = 8
Solve for x
x=5
There are 6 pink jellybeans for every 3 blue jellybeans. What is the ratio of pink jellybeans to total jellybeans?
6 to 9, 6:9, 6/9
What is the divisibility rule for 3? is 543 divisible by 3?
Add up the digits; if the sum of the digits is divisible by 3, then the number is also divisible by 3.
5 + 4 + 3= 12
12÷3= 4
543 is divisible by 3
What is 0.22 as a percent?
22%
Solve the expression:
4 + 3 x 5
19
9 = x - 5
Solve for x
x=14
What is an equivalent ratio to 3/9?
1/3, 6/18, 9/27, etc.
What is the greatest common factor of 24 and 36?
12
What is 0.06 as a fraction?
6/100 = 3/50
Solve the expression:
2² x 9 ÷ 3
12
3x = 42
Solve for x
x=14
I baked 54 cookies in 6 batches. How many cookies did I bake per batch?
9 cookies per batch
What is 1/3 x 3/5?
Simplify your answer!
3/15 = 1/5
What is 2% as a fraction?
Simplify!
2/100 = 1/50
Solve the expression:
20 ÷ 4 + 17 x (9-6)
56
x/5 = 6
Solve for x
x = 30