Ratios
Of the 18 students at dance camp, 6 are boys. What is the ratio of girls to students at the camp?
Put in simplest form for extra points.
12:18, 12 to 18, 12/18 OR
2:3, 2 to 3, 2/3
Find the unit rate: 120 miles in 5 hours
24 miles per hour
5/6 = ?/24
20
Which is the better buy: $.90 for 2 pens or $1.75 for 5 pens?
EXPLAIN WHY.
$1.75 for 5 pens - because it's only $0.35/pen but with the other one it was $0.45/pen.
Out of 28 students in the class, 21 wore sneakers to school. What is the ratio of students who wore sneakers to those who did not wear sneakers?
Put in simplest form for extra points.
21 to 7 OR 3 to 1
Zack walks 30 meters in 20 seconds. How many meters does Zack walk per second?
1.5 meters
What strategy can we use to know if 2 ratios are equivalent?
What is cross multiplication?
$24 for 6 pounds of cereal or $45 for 9 pounds of cereal?
EXPLAIN WHY.
$24 for 6 pounds - because this is only $4 a pound, but the other is $5 a pound.
There are 156 players on 13 teams. How many players are on each team?
12 players on each team
6/9 is equivalent to 2/3. Explain.
What is when you cross multiply, they will get 18 both times?
Which is NOT the better buy. 10 slices of cheese for $2.48 or 12 slices of cheese for $3.18
10 slices of cheese for $2.48
A chef uses 1 cup of cheese per 2 cups of milk in a casserole. How many cups of cheese are needed if the chef uses 6 cups of milk?
3 cups of cheese
Which of the following ratios is NOT equivalent to 5/6? EXPLAIN.
A.) 10/12 B.) 13/14 C.) 15/18 D.) 25/30
B.) 13/14 - because when you simplify A, C, and D, they all become 5/6. Also, when you cross multiply, you will get the same answer, each time.
15.5 oz pack Oreos for $2.98 or 14 oz pack chips Ahoy for $2.50
Chips Ahoy for $2.50
Find the unit rate. $30 for 12 comic books
$2.50 per comic book
Sarah Lee turkey for $6.58 per pound or Butterball turkey for $11.16 for 2 pounds
Butterball turkey for $11.16 for 2 lb