1. lesson 3.notebook August 23, 2012
Lesson 3:
*Equations contain "variables"...which we must try to
find that "unknown".
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2. lesson 3.notebook August 23, 2012
Examples (Lesson 3)
Find the unknown number & check your answer.
A) a + 12 = 31 Check:
B) b - 24 = 15 Check:
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3. lesson 3.notebook August 23, 2012
C) 15c = 180 Check:
D) r/8 = 12 Check:
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4. lesson 3.notebook August 23, 2012
E) 4n = 2 x 12 Check:
F) 3 + 6 + m + 12 + 5 = 30 Check:
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