Subtracting Integers 7 th Grade Math Pg. 103. DART statement: I can subtract integers.

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Presentation transcript:

Subtracting Integers 7 th Grade Math Pg. 103

DART statement: I can subtract integers.

Subtract Integers  To subtract an integer, add its opposite. What is the opposite of -7? What is the opposite of 3?

Examples: 1. 4 – (-9) – (-10)

Subtract Positive Integers Find 8 – 13. (To subtract 13, add -13.) 8 + (-13) -5

Try one on your own. Find -10 – 7. *To subtract 7, add (-7) -17

Subtract Negative Integers Find 1 – (-2). To subtract -2, add

Find -10 – (-7) To subtract -7, add Try these on your own. 4 – (-12) -15 – (-5) 18 – (-6)

Evaluate an Expression Evaluate x – y if x = -6 and y = -5. x – y -6 – (-5)

Evaluate each expression if a=5, b=-8, and c=-9. 1.) b ) a - b 3.) c - a