Model Ratios
Writing Ratios 3 ways
Word Problems
100
Write a ratio of yellow to red circles "3 ways":
5/3, 5:3, 5 to 3
***Yellow comes before the word "to" so that number must be first
100
Write Equivalent Ratios or the ratio 3 ways
1/4
2/8, 3/12, 4/16
100
A recipe requires 2 cups of milk for every 3 cups of flour. If you use 8 cups of milk, how much flour?
2 x 4 = 8 so...
3 x 4 = 12
12 cups of flour
OR Butterfly Method:
8x3= 24 24/2 = 12 cups of flour
200
Write a ratio of red to blue circles "3 ways":
5/6, 5:6, 5 to 6
***Red comes before the word "to" so that number must be first
200
Write Equivalent Ratios or the ratio 3 ways
2/9
4/18, 6/27, 8/36
200
For every $5 Carl spends on movies, he spends $15 on video games. Last month, he spent $45 on video games. How much did he spend on movies?
Ratio is 5:15
double: 10:30 (x2)
triple: 15:45 (x3)
$15 on movies
300
There are 5 dogs and 3 cats. What is the ratio of cats to dogs?
3:5
***cats comes before the word "to" so that number must be first
300
Write Equivalent Ratios or the ratio 3 ways
9/13
18/26, 27/39, 36/52
300
Keely went for a long swim. If she swam 12 km in 3 hours, how far would she swim in 6 hours?
original ratio is 12:3
double ratio: 24:6 (x2)
24km
400
There are 10 white marbles and 3 blue marbles. What is the ratio of blue marbles to total marbles?
3:13
***Blue comes before the word "to" so that number must be first
400
Write Equivalent Ratios or the ratio 3 ways
12/16
Write 7 more Equivalent Ratios:
12/16
400
The ratio of students who like apple juice to grape juice is 4:3. If 30 kids in the class like grape juice, how many kids like apple juice?
original ratio is 4:3
(x10) __ : 30 (x10)
40 kids like apple juice
OR Butterfly Method:
4x30= 120 120/3 = 40 kids like apple juice
500
There are 2 red blocks, 3 orange blocks, and 4 black blocks. What is the ratio of black blocks to total blocks?
4:9
***Black comes before the word "to" so that number must be first
500
Write Equivalent Ratios or the ratio 3 ways
24/36
12/18, 6/9, 2/3, 8/12, 4/6,
500
The ratio of boys to girls is 5 to 4?
If there are 20 girls, how many boys are there?
4 x 5 = 20 girls
5 x 5 = 25 boys
25 boys
OR Butterfly Method
5x20=100 100/4= 25 boys