Introduction To Ratios
Pick any ratio and write it all three ways.
?:?
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? to ?
How do you find equivalent ratios?
Write an example of this process with the ratio 1:2.
Multiply the ratio on both sides by the same number.
1. 1:2
2. Multiply both sides by the same number (2,3,4,5,6)
3. 2:4, 3:6, 4:8, 5:10, 6:12
What would the value of two equivalent ratios be?
The same.
12*9
108
Draw a blank double number line making sure to include where the labels/units would go.
(Label)----------------------->
(Label)----------------------->
What is the symbol : called?
What is the symbol / called?
Colon
Fraction Bar
Find two equivalent ratios for 5:3.
Example Answers
10:6
15:9
20:12
25:15
30:18
15:60
1:4
132/12
What ratio is the starting point for every double number line diagram?
0:0
Write the ratio that represents number of students on your team to teachers.
?:2
Find two equivalent ratios for 10:2.
Example Answers
5:1
20:4
30:6
40:8
50:10
60:12
70:14
72:36
2:1
3,245*2
6,490
What would be the next ratio on this diagram-
(Miles )0---3----6------9----------->
(Hours)0---5---10-----15----------->
12:20
If Sha'carri Richardson ran 100 meters in 11 seconds, what is a ratio that represents this relationship.
100:11
Write an equivalent ratio table with 3 rows for 2:9.
|2 |9 |
|4 |18|
|6 |27|
72:5
72:5
6580/5
1316
Write a situation that is represented by this double number line diagram.
(Questions)0----------5-------10------>
(Points )0----------15------30----->
Answers will vary.
Write both part to part ratios, a whole to part ratio, and a part to whole ratio using the following scenario-
There are 25 students in a class and 2 teachers.
The answer MUST label which is which.
Part:Part
25:2, 2:25
Part:Whole
25:27, 2:27
Whole:Part
27:25, 27:2
Write an equivalent ratio table with 4 rows for 11:12.
| 11 | 12 |
| 22 | 24 |
| 33 | 36 |
| 44 | 48 |
132:108
11:9
567/6
Write the answer with the remainder in BOTH forms.
94 r3
94 3/6
Bob is headed to the store to get ice cream for his family. He knows that two ice cream sandwiches costs $8. If his family has 7 people in it how much will the ice cream cost?
Show your answer using a double number line diagram.
(Ice Cream)0-----2-----4------6--------|------8---->
7
(Dollars )0-----8----16-----24-|-|-|-|-|-|-|-32-->
28