### About Number Line Subtraction:

When we subtract whole numbers using a number line, we start at the left most number of the subtraction problem (minuend) and move left on the number line by the same number of units as we are taking away (subtrahend).

Test Objectives

- Demonstrate the ability to construct a number line for the whole numbers
- Demonstrate the ability to subtract whole numbers using a number line
- Demonstrate the ability to identify the parts of a subtraction problem

#1:

Instructions: Subtract each using a number line and identify the parts of the subtraction problem.

a) 9 - 2

b) 7 - 6

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#2:

Instructions: Subtract each using a number line and identify the parts of the subtraction problem.

a) 11 - 5

b) 6 - 6

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#3:

Instructions: Subtract each using a number line and identify the parts of the subtraction problem.

a) 13 - 4

b) 5 - 2

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#4:

Instructions: Subtract each using a number line and identify the parts of the subtraction problem.

a) 9 - 5

b) 13 - 10

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#5:

Instructions: Subtract each using a number line and identify the parts of the subtraction problem.

a) 12 - 7

b) 10 - 6

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Written Solutions:

#1:

Solutions:

a) 7, 9 - Minuend, 2 - Subtrahend, 7 - Difference

b) 1, 7 - Minuend, 6 - Subtrahend, 1 - Difference

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#2:

Solutions:

a) 6, 11 - Minuend, 5 - Subtrahend, 6 - Difference

b) 0, 6 - Minuend, 6 - Subtrahend, 0 - Difference

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#3:

Solutions:

a) 9, 13 - Minuend, 4 - Subtrahend, 9 - Difference

b) 3, 5 - Minuend, 2 - Subtrahend, 3 - Difference

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#4:

Solutions:

a) 4, 9 - Minuend, 5 - Subtrahend, 4 - Difference

b) 3, 13 - Minuend, 10 - Subtrahend, 3 - Difference

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#5:

Solutions:

a) 5, 12 - Minuend, 7 - Subtrahend, 5 - Difference

b) 4, 10 - Minuend, 6 - Subtrahend, 4 - Difference