 18 + (-25) = ?  (-1/2)(-4/3) = ?  What is the difference between a daily low temperature of -5°F and a daily high temperature of 18°F?

Algebra II

 Study the properties of real numbers.

 Opposite – additive inverse, of any number b is –b.  Reciprocal – multiplicative inverse, of any nonzero number b is (1/b).

 Graph the real numbers - √5 and (7/2) on a number line.

 The table shows the record low temperatures for several states. Which list shows the temperatures from highest to lowest?  A) -80, -54, -45, -32, -2, 12  B) -80, -54, -45, -32, 12, -2  C) 12, -2, -32, -45, -54, -80  D) 12, -2, -32, -54, -45, -80 AKCAFL -80°F-45°F-2°F HIORTN 12°F-54°F-32°F

PropertyAdditionMultiplication Closurea + b is a real numberab is a real number Commutativea + b = b + aab = ba Associative(a + b) + c = a + (b + c)(ab)c = a(bc) Identitya + 0 = a, 0 + a = aa * 1 = a, 1 * a = a Inversea + (-a) = 0a * (1/a) = 1, a ≠ 0

Identify the property that the statement illustrates.  5 + (9 + 12) = (5 + 9) + 12  250 * 1 = 250

 A. You work 8 hours and earn $60. What is your earning rate?  B. You buy 18 gallons of gasoline at $2.65 per gallon. What is your total cost?  C. You drive 90 kilometers per hour. What is your speed in meters per second?

 The driving distance between Minneapolis, Minnesota, and Winnipeg, Manitoba, Canada, is about 450 miles. The driving distance between Vancouver, British Columbia, Canada, and Seattle, Washington, is about 325 kilometers.  A. Convert the distance from Minneapolis to Winnipeg to kilometers. (1 mile = 1.61 km)  B. Convert the distance from Vancouver to Seattle to miles.

 Pg. 6 – 7 (4 – 8 even, 9 – 16 all, 26 – 38 even)