When we add whole numbers using a number line, we start at the leftmost number of the problem and move to the right by the same number of units as we are adding. For example, if we are adding 1 + 3 using a number line, start at the number one and move three units right to end up at four.

Test Objectives
• Demonstrate the ability to construct a number line for the whole numbers
• Demonstrate the ability to add two whole numbers using a number line
• Demonstrate the ability to add more than two whole numbers using a number line

#1:

Instructions: Add each using a number line.

a) 1 + 4

b) 2 + 6

c) 5 + 2 + 3

#2:

Instructions: Add each using a number line.

a) 1 + 3 + 2

b) 6 + 2 + 4

#3:

Instructions: Add each using a number line.

a) 4 + 3 + 5 + 1

b) 7 + 1 + 5 + 1

#4:

Instructions: Add each using a number line.

a) 9 + 4 + 3 + 1 + 2

#5:

Instructions: Add each using a number line.

a) 10 + 2 + 4 + 6 + 1

Written Solutions:

#1:

Solutions:

a) 5 b) 8 c) 10 #2:

Solutions:

a) 6 b) 12 #3:

Solutions:

a) 13 b) 14 #4:

Solutions:

a) 19 #5:

Solutions:

a) 23 