Section 2.3 Subtracting Integers.

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Presentation transcript:

Section 2.3 Subtracting Integers

Steps Given the four options Double negatives equal a positive 1 a - b 2 -a - (-b) -a - b a - (-b) Double negatives equal a positive 1 a + (- b) -a – (-b) = -a + (b) -a + (- b) a – (-b) = a + (b) Follow the adding Rules

Option 1 Option 1 a – (b) = a + (- b) Example : 934 – (23)

Option 2 Option 2 -a – (-b) = -a + (b) Example -72 – (-150)

Option 3 Option 3 -a – (b) = -a + (- b) Example -217 – (23)

Option 4 Option 4 a – (-b) = a + (b) Example 691 – (-52)

Example Simplify -12 – (-34) 345 – (-12) -903 – (49) 12 – (162)

Example Simplify -457 – (-123) 55 – (-84) 6,914 – (456) -14 – (297)

Word Problem The coldest temperature ever recorded on Earth was -129°F in Antarctica. The warmest temperature ever recorded was 134°F in Death Valley, California. How many degrees warmer is 134°F than -129°F

Example Find the difference in temperature between the Months of March and February. Find the difference in temperature between the months of November and December.