Ratios
There are 10 white marbles and 3 blue marbles. What is the ratio of white to blue marbles?
10:3
For every 9 token Lisa has, Toby has 13. Write a ratio of the number of tokens Lisa has to the number of tokens Toby has
9 to 13
9/13
Pet Smart has 3 turtles for every 5 snakes.
Draw a tape diagram to represent the ratio of turtles to snakes.
turtle -ooo
snakes -ooooo
What is the missing term that will make the ratios equivalent? 2 : 4 = ____ : 32
16
Fill in the blank:
A ratio is a _____________ of two quantities.
Comparison
a comparison of two quantities
Ratio
There are 27 white marbles and 13 blue marbles. What is the ratio of white to all marbles?
27:40
A recipe of lemonade calls for 2 lemons and 5 cups of water. Write a ratio describing the cups of water to number of lemons.
5:2
5 to 2
5/2
For every 2 baskets of apples, there are 5 basket of peaches. If there are 15 baskets of peaches, how many baskets of apples are there? Draw a tape diagram to represent this situation.
6:15
6 baskets of apples
(3)(3)
(3)(3)(3)(3)(3)
Write 2 equivalent ratios to 1/2.
2:4
3:6
4:8
etc.
List the three ways to write a ratio.
colon, to, fraction
equal in value, amount, function, meaning, etc.
equivalent
There are 2 red blocks, 3 orange blocks, and 4 black blocks. What is the ratio of all to black blocks?
9:4
There are 43 6th grade boys and 52 6th grade girls. Write a ratio describing the total number of students in 6th grade to 6th grade girls.
95 : 52
95 to 52
95/52
I am a world class pizza chef. Every 30 minutes I can make 7 pizzas. How many can I make in 2 and a half hours?
35 pizzas
Write 2 equivalent ratios to 1 / 3.
2:6
3:9
4:12
How to determine if two ratios are equivalent?
Simplify both ratios. If they have the same value, they are equivalent.
OR
Scale factor. If they have the same scale factor (multiply or divide by same number for both quantities of ratio), they are equivalent
A number that divides the given number evenly or exactly, leaving no remainder OR
A number multiplied to create a product
Factor
There are 2 red blocks, 3 orange blocks, and 4 black blocks. What is the ratio of red and orange blocks to black blocks?
5:4
There are 5 squares and 2 circles on a math mural. How many times as many squares are there circles?
5/2
2 1/2
If it takes 8 cups of flour for every 2 tsp of baking soda to bake a cake, how many cups of baking soda would I need for 4 cups of flour? Create a labeled double number line to represent the situation.
0__|__|___|___|___|___ Flour
4 8 16 24 32
0_|__|___|__|___|___Baking soda
1 2 4 6 8
What is the missing term that will make the ratios equivalent?
10 / 13 = ____ / 52
40
Are the two ratios equivalent? 56:8 and 14 :2
Use a table to show your thinking.
Yes
An operation that puts together equal groups
Multiplication
TRUE or FALSE: You can always make equivalent ratios by adding or subtracting the same number on both parts of a ratio.
False
There are 15 hats, 2 scarves, and 3 coats in Ms. Murray closet.
Write the ratio of the number of hats and coats to the total number of all items in the closet.
18: 20
18 to 20
18/20
For every 7 donuts there are 3 brownies at a bakery. Graph it !
Graph will vary
Write 2 equivalent ratios to 8/ 9.
16/18
24/27
32/36
etc.
Are the two ratios equivalent? 18:4 and 14 : 3
NO
A value that does not change
Constant