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How to convert fractions into decimals?
e.g. 4/5 |
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Divide numerator by denominator
ans - 0.8 |
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Part = Percent x Whole
fraction x what is x/total amount |
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| Percent change = Amount of increase/decrease divided by original whole |
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| Last 2 digits are multple of four |
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| Sum of digits is a multiple of 3, last digit is even |
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| Sum of digits is multiple of nine |
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| Sum of digits is multiple of 3 and last two digits are a multiple of 12 |
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| How do you use the average to find the SUM |
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| SUM = Average x No. of terms |
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| Average of evenly spaced consecturtive numbers = |
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| Ave of evenly spaced consecutive numbers = average of smallest and largest number divided by two |
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Special Triangle
30: 60:90 sides equal... |
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Right isolceles triangle
45:45:90 sides equal .... |
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Definition
Sides equal =
X, X , X sqrt X |
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| average of parallel sides x height |
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Distance between planes on a grid.
If y co-ordinates are the same than... |
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Definition
Subtract the x's.
eg. (2,3) (-7, 3)
subtract x's = 2- (-7) |
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| How do you find the slope of a line? |
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Definition
Slope = change in y divided by change in X
eg. co-ord (1,2) (4, -5)
slope = -5 -2 divided by 4- 1 =
-7 over 3 |
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| Surface area of a cyclinder |
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Definition
2pi r sq = two circle ends
2 pi r x h= circumference or circle (length of rectangle) x height |
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