Ratios
There are 10 white marbles and 3 blue marbles. What is the ratio of white to blue marbles?
10:3
There are 5 squares and 2 circles on a math mural. What is the ratio of circles to all shapes?
2:5
2:7
5:2
If it takes 8 cups of flour for every 2 tsp of baking soda to bake a cake, how many tsp of baking soda would I need for 4 cups of flour?
8 / 2 = 4
so 4 / 4 = 1
1 tsp
Write 2 ratios equivalent to 2:3
4:6
6:9
8:12
Comparing 2 or more quantities is called what?
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. How many lemons would you need for 4 batches?
8 lemons
10 lemons
4 lemons
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?
5 x 3 = 15
so 2 x 3 = 6
6 baskets of apples
Write 2 equivalent ratios to 1 to 2
2:4
3:6
4:8
1/3 and 3/1 are _______________ of one another
reciprocals
There are 2 red blocks, 3 orange blocks, and 4 black blocks. What is the ratio of all to black blocks?
9:4
The car was traveling at 60 miles per hour. How many miles will it go in 7 hours?
70 miles
92 miles
420 miles
I am a world class pizza chef. Every 42 minutes I can make 7 pizzas. How many minutes does it take per pizza?
42 / 7 = 6
so 6 minutes per pizza
Which ratio is equivalent to 5 to 15? 1:2 or 1:3
1:3
What are two ways we can represent equivalent ratios?
Double number line and table
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
If 12 bags of chips cost 25.95, how much does ONE cost?
$2.00
$2.16
$2.25
If a recipe calls for 2 cups of flour and 1 cup of brown sugar, how would that ration change if you tripled the recipe?
6 cups of flour to 3 cups of brown sugar
Which ratios are equivalent to 3:9
1:3
4:6
12:36
15:40
1:3 and 12:36
What do we call two ratios that are the same value or amount?
equivalent ratios
TRUE or FALSE: You can always make equivalent ratios by adding or subtracting the same number on both parts of a ratio.
False
The recipe for slime is 3 parts glue, 1 part contact lens solution, 2 parts shaving cream. If I want to make 6 batches, how much of each ingredient is needed?
18 glue, 1 contact lens solution, 10 shaving cream
18 glue, 6 contact lens solution, 60 shaving cream
6 glue, 6 contact lens solution, 6 shaving cream
For every 7 donuts there are 3 brownies at a bakery. At this rate, how many brownies are there if there are 56 donuts?
24 brownies.
Which ratios are equivalent to 6 to 8?
2:3
3:4
12:16
18:26
3:4 and 12:16
What does "per" refer to?
The unit of one.