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Operations with Integers
0-3 Operations with Integers
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Example 1 pg. P11 Add Integers with the same sign
Use the number line to find −2+3.
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Example 1 pg. P11 Add Integers with the same sign
Use the number line to find − −
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Absolute Value The distance a number is from zero on the number line.
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Rules for adding integers
Integers with the same sign (++ or −−) Add the numbers and keep the sign. Integers with different signs (+−or −+) Subtract the smaller value from the larger value and take the sign of the largest value
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Example 2 pg. P11 Add integers using absolute value
Find −15+ −4 .
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Example 2 pg. P11 Add integers using absolute value
Find −15+ − −19
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Opposites Every positive integer has an opposite negative integer
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Additive Inverse (used when subtracting)
A number and its opposites are additive inverses. Subtraction means to “add the opposite”
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Example 3 pg. P11 Subtract Positive Integers
Find 11−15.
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Example 3 pg. P11 Subtract Positive Integers
Find 11−15. −4
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Rules for multiplying integers
Integers with the same sign (++ or −−) The product will always be a positive answer Integers with different signs (+−or −+) The product will always be a negative answer
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Example 4 pg. P12 Multiply and divide Integers
Find each product or quotient. 1.) −9 4 2.) −112÷ −8 3.) −11 −11 4.) 96÷ −6
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Example 4 pg. P12 Multiply and divide Integers
Find each product or quotient. 1.) −9 4 −36 2.) −112÷ − ) −11 − ) 96÷ −6 −16
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0-3 pg. P
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