ALEKS Basic Math Placement Test Review.pdf file:///C:/Users/HP/Desktop/AAAAA/ALEKS%20Basic%20Math%20
ALEKS Basic Math Placement Test Review
1. how to find domain with a given equation: -if a fraction, set denom. to zero, then solve
-in equation, plug in 0 for x
*usually can be a + or - solution*
2. (-) + (-)= ...
(-) x (-)= ...
(-) divided by a (-)= ...: (-) (+)
(+)
3. quotient: division
4. adding and subtracting fractions: -make denoms the same
-add/subtract numerators
5. multiplying fractions: just multiply numerators across and denoms across and simplify
6. dividing fraction: multiply by reciprocal (change second fraction to reciprocal)
7. multiplying/dividing/adding mixed fractions: turn them into regular fractions
(multiplying # by denom, adding it to num, keeping denom the same) and continue
8. subtracting mixed fractions: *first: make denoms the same*
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,ALEKS Basic Math Placement Test Review.pdf file:///C:/Users/HP/Desktop/AAAAA/ALEKS%20Basic%20Math%20
set up as if you're subtracting two large numbers (on top and on bottom)
9. how to solve problems like 5-2 (1/3): 1) make problem 5- (2 (1/3))
2) separate : 5- 2- (1/3) to get: 3- (1/3)
3) rewrite whole #: 2+1- (1/3)
4) rewrite as: 2 + (3/3) - (1/3) to ed up with:
2 (2/3)
10. inequality problem rule (<, >, etc like problems): When *multiplying/dividing* each side
by a *positive* number, the inequality sign *stays the same*
When *multiplying/dividing* each side by a *negative* number, we *flip* the inequal- ity sign.
11. area and circumference of circle: A= pi x r^2 C= 2 x
pi x r
12. area and perimeter of a triangle: A= (1/2)bh (unit squared) P=
side+side+ side
13. Volume and surface area of a rectangular prism: V=lwh (unit to the 3rd power) SA= 2(wl +
hl+ hw)
14. distance formula: d= rate x time
15. percent to fraction: percent as numerator and 100 as denominator, then sim- plify
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