GCF/LCM
Find GCF of 64 and 32
32
Mrs. Simpson’s class has 10 girls and 15 boys.
What is the ratio of girls to boys
2/3
For every 2 girls
There are 3 boys
A principal needs 2 chaperones for every 25 students at the school dance. How many chaperones does he need if 225 students are expected to be at the dance? (Hint: create a ratio table or Cross multiply)
18 chaperones
Determine if each pair of ratios or rates is equivalent. Explain your reasoning:
8 out of 10 boys play a sport
25 out of 30 boys play a sport
No, they are not equivalent
A class survey showed that 8 out of 25 students had plans to travel over spring break. How many students out of 400 students in the entire school would you expect to be traveling over spring break?
128 students
Find GCF of 14 and 22
2
There are 8 red marbles and 32 blue marbles in a jar.
What is the ratio of red marbles to blue marbles?
¼
For every 1 red there are 4 blue.
Sam is having a pizza party. If two large pizzas serve 9 people, how many pizzas should she order to serve 27 guests at the party? (hint: make ratio table OR cross multiply)
6 pizzas
Determine if each pair of ratios or rates is equivalent. Explain your reasoning:
3 teachers for 63 students
7 teachers for 147 students
Yes, sicne the unit rates are the same they are equivalent
The world's fastest insect is the dragonfly, which can fly up to 36 miles per hour. At this rate, how long would it take a dragonfly to travel 54 miles?
1.5 hours
Find LCM of 9 and 6
18
Find Unit Rate: 42 watts used in 3 seconds
14 watts per second
The Jeans source sells jeans for $25 per pair. Mary's Boutique sells jeans for $30 per pair. Create two ratio tables for each store that shows the total cost for 1, 2, 3, or, 4 pairs of jeans. List the information as an ordered pair.
The jeans Source: (1,25), (2, 50), (3, 75), (4, 100)
Mary's Boutique: (1, 30), (2, 60), (3, 90), (4, 120)
Determine if each pair of ratios or rates is equivalent. Explain your reasoning:
15 minutes to read 9 pages
50 minutes to read 30 pages
Yes, since the unit rates are the same they are equivalent
If 15 pies will serve 120 people, how many pies are needed for 152 people?
19 pies
Find LCM of 12 and 30
60
Find Unit rate: $6.62 for 2 pounds of tomatoes
$3.31 per pound
Graoh each stores ordered pairs on the coordinate grid on the back of your boards.
The jeans Source: (1,25), (2, 50), (3, 75), (4, 100)
Mary's Boutique: (1, 30), (2, 60), (3, 90), (4, 120)
The teacher will come check your graphs and award points.
Lusita earned $85 for 8 hours of babysitting. Avery earned $125 for 11 hours of babysitting. Are the rates equivalent? Explain
No, the rates or not euqivalent
Leo recorded his speed while skateboarding and determined he was traveling 18 feet per second. How many feet could he travel in one minute?
1080 ft.
A warehouse has three shelves that can hold 8, 12, or 16 skateboards. Each shelf has sections holding the same number of skateboards. What is the greatest number of skateboards that can be put in a section?
4 skateboards
Find Unit rate:$320 for 40 hours of work.
$8 per hour.
A store is having a sale on CDs. Adrian buys 5 CDs and spends $40. If he decides to go back to the sale and buy 2 more CDs, how much will he pay? (hint: make ratio table OR cross multiply)
$ 16
Mrs. Boudreaux recorded 17 absences in her class during the first 30 days of school. During the last 60 days of school, she recorded 42 absences. Are the rates equivalent? Explain
No, the ratios are not equivalent
The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in the class?
15 girls