1-5 MULTIPLYING AND DIVIDING INTEGERS MS. BATTAGLIA – ALGEBRA 1 CP OBJECTIVE: MULTIPLY AND DIVIDE...
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1-5 MULTIPLYING AND DIVIDING INTEGERS MS. BAT TAGLIA – ALG E BRA 1 CP OBJ ECTIVE: MULT I PLY AND DIVI DE WITH INT EGERS AN D DE C IMAL S, SIMPL IFY EXPRESSI ONS WITH EXPONENT S, EVALUATE EXPRESSI ONS .
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Transcript of 1-5 MULTIPLYING AND DIVIDING INTEGERS MS. BATTAGLIA – ALGEBRA 1 CP OBJECTIVE: MULTIPLY AND DIVIDE...
1-5 M
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WARM UP
Evaluate a – b + c for a = - 2, b = 3, c = - 4
WORK WITH A PARTNER
During a space shuttle’s first stage of return to Earth, it descends about 3.5 mi/min (write this as – 3.5 mi/min). To find how far the shuttle descends in 10 min, you need to find (-3.5)(10).
1)Did the shuttle’s altitude increase or decrease?
2)Which phrase better describes descending 35 mi? Why?
a) A change in altitude of 35 mi b) A change in altitude of -35 mi
3) Is the product (-3.5)(10) equal to 35 or -35?
GENERALIZE…
Is the product of a positive and a negative number positive or negative?
Is the quotient of a positive and a negative number positive or negative?
Is the product or quotient of two negative numbers positive or negative?
RULES
+ + = +
+ - = -- - = +
EXAMPLE
Evaluate for x = - 20, y = 6, and z = - 1
EXAMPLE
Find the mean high temperature. Round to the nearest degree.
EXAMPLE
Use the order of operations.
a) - 34 b) (-3)4
HOMEWORK
P. 27-28 #2-30 even, 34-40 even
