SUBTRACTING REAL NUMBERS

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SUBTRACTING REAL NUMBERS
Section 2.3
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Simplify each expression.
30
30
The example above shows us that subtraction can
be thought of as ______________________________
_______.
adding the opposite
For all real numbers a and b
___________________
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Example 1 Write the following subtraction
problems as addition problems do not evaluate.
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Algebra tiles can be used to subtract integers.

Remember integers are
Example 2 Use algebra tiles to represent
1. rewrite as an addition problem
____________ 2. use algebra tiles to represent
the addition problem 3. cross out any neutral
pairs.
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Example 3 Use the definition of subtraction to
find each difference.
A.
B.
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D.
C.

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Try these
A.
B.
D.
C.
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distance
To find the ____________ between two numbers on a
number line, first ______________ the values, and
then find the __________________ of the
difference.
subtract
absolute value
Example 4 Find the distance between -4 and 2.
Subtract in either order still come up with the
same answer!
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Find the distance between the following pairs of
numbers. A. -5 and 3 B. -4 and -10 C. 17 and -5
A.
B.
C.
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Try these D. -2 and 13 E. 3 and -6 F.