Ratios
In a picture, there are 6 stars and 2 hearts. What is the ratio of hearts to stars?
2:6 or 1:3
Example answers:
6:10, 9:15, 12:20, ...
5 shovels of sand are mixed with 4 shovels of gravel to make cement. What is the number of shovels of gravel needed for 45 shovels of sand?
36 shovels of gravel
Write a unit rate for this situation: 310 heartbeats per 5 minutes
62 heartbeats/minute
In a drawing, there are three circles, four stars, and three triangles. What is the ratio of stars to the total number of shapes?
4:10 or 2:5
I mixed 9 parts yellow and 3 parts red. My friend mixed 3 parts yellow and 1 part red. Will the colors match? Why or why not?
Yes - the ratios are the same
Jackson can walk 2 miles in 40 min. What is the amount of time it will take him to walk 6 miles?
120 min.
Bryce read 126 pages of a book in 18 minutes. How many pages did he read in 1 minute?
7 pages per minute
The recipe calls for 2 eggs for every 8 cups of flour. Draw a tape diagram. How many eggs are needed with 40 cups of flour?
Show your teacher the tape diagram
10 eggs
Which ratio is not equivalent to the others?
18/24 2/3 6/8 9/12
2/3
You mix 3 parts yellow and 4 parts blue to make green. You have 35 parts of the green. How many parts of yellow did you use? How many parts of blue did you use?
15 parts of yellow and 20 parts of blue
The science materials cost $65.70 to do the experiment. If 9 students participated in the experiment, what was the unit cost per student?
$7.30
There are 40 rabbits in a cage. The ratio of white rabbits to grey rabbits is 3:7. Draw a tape diagram first. How many white rabbits are in the cage?
Show your teacher the tape diagram
12 white rabbits
Are these ratios equivalent? Explain.
48:36
144:32
No - explain to your teacher.
A serving of 24 chips has 320 mg of sodium. How much sodium do you eat with 18 chips? Create a ratio table.
Show the ratio table to your teacher.
240 mg. of sodium.
Rose spent $2.00 for 20 pieces of gum. Joe spent $1.50 for 10 pieces of gum. Who got the better deal and why?
Rose got the better deal. She got one piece for $0.10 and Joe spent $0.15 for one piece.