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Subtracting Integers Test

When we subtract integers, we change the subtraction problem to addition of the opposite. For example: -5 - 7 = -5 + (-7) = -12. We always keep the first number the same, change the subtraction to addition, and change the sign of what’s being subtracted away.

Test Objectives:

•Demonstrate the ability to change a subtraction problem to addition of the opposite

•Demonstrate the ability to perform a subtraction with two integers

•Demonstrate the ability to perform a subtraction with more than two integers

Subtracting Integers Test:

#1:

Instructions: Perform each subtraction.

a) 6 - 8

b) 11 - 17

c) -15 - 9

d) -12 - 22

e) -14 - 115

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#2:

Instructions: Perform each subtraction.

a) -7 - 8

b) -4 - (-2)

c) -1 - 99

d) -70 - (-12)

e) -18 - (-13)

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#3:

Instructions: Perform each subtraction.

a) 3 - 8 - 6 - 17

b) 5 - 3 - 7 - 11

c) -7 - (-9) - 4 - 9

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#4:

Instructions: Perform each subtraction.

a) -15 - (-25) - 17 - (-8) - 4

b) -27 - (-103) - 81 - 54 - (-13)

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#5:

Instructions: Perform each subtraction.

a) -90 - 27 - (-7) - 14 - (-28) - 11

b) -45 - 300 - (-4) - (-2) - 39 - (-73)

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Written Solutions:

#1:

Solution:

a) 6 - 8 = -2

b) 11 - 17 = -6

c) -15 - 9 = -24

d) -12 - 22 = -34

e) -14 - 115 = -129

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#2:

Solution:

a) -7 - 8 = -15

b) -4 - (-2) = -2

c) -1 - 99 = -100

d) -70 - (-12) = -58

e) -18 - (-13) = -5

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#3:

Solution:

a) 3 - 8 - 6 - 17 = -28

b) 5 - 3 - 7 - 11 = -16

c) -7 - (-9) - 4 - 9 = -11

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#4:

Solution:

a) -15 - (-25) - 17 - (-8) - 4 = -3

b) -27 - (-103) - 81 - 54 - (-13) = -46

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#5:

Solution:

a) -90 - 27 - (-7) - 14 - (-28) - 11 = -107

b) -45 - 300 - (-4) - (-2) - 39 - (-73) = -305

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