The document describes how to use a ratio table and double number line diagram to solve a word problem about how long it will take Katie to make 8 rainbow loom bracelets. It involves making a ratio table with the given information that Katie makes 5 bracelets in 20 minutes. Then making a double number line diagram with the ratios to determine that it will take Katie 32 minutes to make 8 bracelets. The answer is verified by checking that it is between the ratios on the table and diagram.

1. Name ______________________________________ Date ________________
Mrs. Labuski / Mrs. Pinto Mod 1 Lesson 12
Lesson 12: From Ratio Tables to Double Number Line Diagrams
Katie makes 5 rainbow loom bracelets in 20 minutes. How long will it take her to make 8
bracelets?
Step 1 – Make a table
Bracelets
Minutes
Step 2 – Identify question
Bracelets
Minutes
__
__
Step 3 – Make a double number line diagram
 Label both number lines
 Write all needed ratios on the number lines
 Identify the question
Step 4 – Number the number line for the given value using the least amount of units
(number it by ones, fives, tens, etc that fits with the given number to create the least amount of
columns.)

2. Step 5 – Determine the fraction of the other unit we are trying to find
 For example: The number line of the given unit was broken into five sections
 We need to figure out the span of the other number line
 Therefore we need to find
3
5
of 20
 What is
1
5
of 20
6 7 8 9
Step 6 – Find the fraction of the number
Find
ퟏ
ퟓ
of 20
Step 7 – Number the other number line.
It will take Katie ________minutes to make 8 rainbow loom bracelets.
This answer is reasonable because it falls between the two ratios on the double number line
diagram and ratio table.
8
Bracelets 5 10 15
Minutes 20 40 60
bracelets
minutes
5 10
20 40
?
32

3. Name ______________________________________ Date ________________
Mrs. Labuski / Mrs. Pinto Mod 1 Lesson 12
Lesson 12: From Ratio Tables to Double Number Line Diagrams
Katie makes 5 rainbow loom bracelets in 20 minutes. How long will it take her to make 8
bracelets?
Step 1 – Make a table
Bracelets 5 10 15
Minutes 20 40 60
Step 2 – Identify question
8
Bracelets 5 10 15
Minutes 20 40 60
?
Step 3 – Make a double number line diagram
 Label both number lines
 Write all needed ratios on the number lines
 Identify the question
bracelets
minutes
5 10
8
?
20 40
Step 4 – Number the number line for the given value using the least amount of units
(number it by ones, fives, tens, etc that fits with the given number to create the least amount of
columns.)
bracelets
minutes
6 7 8 9
5 10
?
20 40

4. Step 5 – Determine the fraction of the other unit we are trying to find
 For example: The number line of the given unit was broken into five sections
 We need to figure out the span of the other number line
 Therefore we need to find
3
5
of 20
 What is
1
5
of 20
6 7 8 9
Step 6 – Find the fraction of the number
Find
ퟏ
ퟓ
of 20
1 x 20 = 20 = 4
5 1 5
Step 7 – Number the other number line.
24
28
32 36
It will take Katie 32 minutes to make 8 rainbow loom bracelets.
This answer is reasonable because it falls between the two ratios on the double number line
diagram and ratio table.
8
Bracelets 5 10 15
Minutes 20 40 60
bracelets
minutes
5 10
20 40
?
20
32