WARM UP 1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 +

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Presentation transcript:

WARM UP 1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 + (-7)b) 4 + (-10) 4

WARM UP 1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 + (-7)b) 4 + (-10) 3

WARM UP 1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 + (-7)b) 4 + (-10) 2

WARM UP 1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 + (-7)b) 4 + (-10) 1

1)Evaluate the expression: a) l5lb) l-13lc) – l0.56l 2)Use mental math to solve the equation: a) lxl = -10b) lxl = 2.7 3)Find the sum: a) -6 + (-7)b) 4 + (-10) WARM UP 0

9/25/ Subtracting Real Numbers GOALSubtract real numbers using the subtraction rule KEY WORDS: Term

Subtracting Real #s Some addition expressions can be evaluated using subtraction ADDTION PROBLEM SUBTRACTION PROBLEM 5 + (-3) = 25 – 3 = (-6) = -8-2 – 6 = -8

Subtracting Real #s To subtract b from a, add the opposite of b to a. a – b = a + (-b) EXAMPLE: 3 – 5 = 3 + (-5)

Subtracting Real #s EXAMPLES a. 10 – 11b. 11 – – 11 = 10 + (-11) = – 10 = 11 + (-10) = 1

Subtracting Real #s Expressions with more than one subtraction EX: 4 – (-4) – (-4) – 5 = (-5) 8 + (-5) 3

PRACTICE a.4 – 5 b. 0 – (-7) c

PRACTICE d. 2 – (-3) – 6 e – (-5)