Math 9 – Feb 17: 2.2/2.3 Expressing Numbers as Powers

(-3)2  = (-3) x (-3) = +9

-32  = (3) x (3) = 9

Brackets change what base is being repeated – be careful with the final sign (+/-) of your answer.

50 = 1

Any non-zero base to the power of zero equals one

Math Journal Entry #2 – Explain how you can predict the sign of a power with a negative base. Give numerical examples to help your explanation.Choose one HW question to solve and explain in your journal.

Homework: pg 56 # 1-5 (a,c,e) 10, 11, 17, 20, 21
Text Section 2.2

About Mrs. Dildy

I am a math and science teacher in the Saanich school district.
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