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Subtracting Integers. 7 th Grade Math Objective: Students will use the rules for subtracting integers. Rule – Subtracting Integers. Add the opposite. Leave the 1 st number alone Change the operation to addition. Change the sign on the 2 nd number. Use the rules for adding integers.
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Subtracting Integers 7th Grade Math Objective: Students will use the rules for subtracting integers.
Rule – Subtracting Integers • Add the opposite. • Leave the 1st number alone • Change the operation to addition. • Change the sign on the 2nd number. • Use the rules for adding integers
Subtracting Integers • -10 – 7 = • -10 + (-7) = • 5 – (-16) = • 5 + (+16) = • -4 – 8 = • -4 + (-8) = -17 21 -12
Subtracting Integers • 8 – 13 = • 8 + (-13) = • 17 – 3 = • 17 + (-3) = • 10 – 30 = • 10 + (-30) = -5 14 -20
Subtracting Integers - Practice • 14 – (-10) = • -11 – (-9) = • 12 – 26 = • -27 – 33 = • 18 – (-20) = • 31 – 48 =
Subtracting Integers • Owen shot 2 under par while his friend Nathan shot 3 above par. By how many shots was Owen’s score better than Nathan’s? -2 – 3 = -2 + (-3) = 5
Subtracting Integers • The summit of an oceanic volcano once had an elevation of -3,780 feet. The summit now has an elevation of -800 feet. What was the change in elevation? -3780 – (-800) = -3780 + (+800) = 2980 feet
