2. Lesson 03 thru 08.notebook August 20, 2012
Lesson 0.30.8 WarmUp:
1) Julie answered 21 out of 25 questions correctly, what
percent did she answer correctly?
2) Compare: 7/20 2/5
3) What is the reciprocal of 4/11?
4) Convert 2 3/5 to an improper fraction.
5) Convert 37/4 to a mixed number.
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3. Lesson 03 thru 08.notebook August 20, 2012
Lessons 03 thru 08:
REMEMBER:
Rules for adding signed numbers:
signs same: ADD use the same sign
signs different: SUBTRACT use the sign of the larger
Rule for subtracting signed numbers:
ADD the OPPOSITE use the rules for adding
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4. Lesson 03 thru 08.notebook August 20, 2012
Examples:
Add or subtract:
A) 25 + (16)
B) 57 34
C) 33.7 (24.2)
D) 1/2 + 4/5
E) 7/8 (3/16)
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5. Lesson 03 thru 08.notebook August 20, 2012
and...REMEMBER:
Rules for multiplying or dividing signed numbers:
signs same: MULTIPLY or DIVIDE solution is +
signs different: MULTIPLY or DIVIDE solution is
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6. Lesson 03 thru 08.notebook August 20, 2012
More Examples:
Multiply or divide:
F) 78 (1.3)
G) (1/3)(7 1/2)
H) 11/12 (1 1/5)
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7. Lesson 03 thru 08.notebook August 20, 2012
To do a Percent Problem:
percent x of = is
...fill in the given pieces and isolate the missing piece!
**AND the fraction bar means:
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8. Lesson 03 thru 08.notebook August 20, 2012
More Examples:
Express as a fraction or mixed number.
I) 0.4%
Find each number.
J) 16 is what percent of 40?
K) 1 is what percent of 400?
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9. Lesson 03 thru 08.notebook August 20, 2012
Look at page P24...parts of a circle...
Formulas:
*Circumference = pi x diameter pi = 3.14
Look at P26....more formulas...
*Area of a parallelogram = base x height
*Area of a triangle = base x height
base and height
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must be
*Area of a circle = pi x radius 2 perpendicular!!
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