Vocabulary
A comparison of two quantities by division
Ratio
Mahoney can grade 15 papers in 20 minutes. How many papers can she grade in an hour?
45
2 bottles of water cost $4, how much does one cost?
$2
Which of these is not equivalent?
4:16
1:4
4:1
2:8
2:8
What is the greatest common factor between 16 and 24
8
A ratio that compares two quantities measured in different units
Rate
Nathan makes $25 for every 2 lawns he mows. How many lawns does he need to mow to make $100?
8 lawns
3 pairs of sunglasses for $52.50. What is the cost of 1 pair?
$17.50
In 5 molecules of ammonia there are 15 Hydrogen atoms and 5 Nitrogen. How many Hydrogen atoms are in 8 ammonia atoms?
24
What is the least common multiple of 7 and 4
28
A rate in which the second quantity in the comparison is one unit
Unit rate
Red maples grow on average 18 inches per year. How long will it take a red maple to grow 9 feet?
6 years
4 boxes of cereal for $13.96, what is the cost of one box of cereal?
$3.49
Fill in the blank:
3:7 = 12:?
28
Put the following numbers in order of greatest to least:
-4, 6, 8, 0, -7
8, 6, 0, -4, -7
Ratios that name the same comparison
Equivalent Ratios
Your favorite shade of purple is made by combining 3 pints of blue and 5 pints of red. If you have 15 pints of red and enough blue to keep the proportions the same. How many pints of purple paint can you make?
24 pints
2.5 pounds of apples for $3.50, how much does one pound cost?
$1.40
Fill in the blank:
?:8 = 12:32
3
What is the absolute value of 4/5
4/5
An equation that states that two ratios are equivalent
proportion
Mahoney is spending the day catching Pokémon at a constant rate. She catches 18 Pokémon in half an hour. How long will it take her to catch 90?
2.5 hours
Five candy bars for $6.60. What is the cost of one candy bar?
$1.32
Fill in the blank:
36:45 = ?:5
4
Solve:
1 1/4 x 1/2
5/8