Exam (elaborations)
ALEKS Math Placement Test Fomulas
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- ALEKS Math Placement Test Fomulas
ALEKS Math Placement Test Fomulas
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ALEKS Math Placement Test FomulasPlace Value - -The value of a digit based on its position within a number
-Fractions - -A number expressed in the form a/b where a is a whole number
and b is a positive whole number.
-Adding and Subtracting with the same denominator - -a/b + c/b = a+c/b
OR a/b - c/b = a-c/b
-Adding and Subtracting with different denominators - -a/b + c/d =
ad+cb/bd OR a/b - c/d = ad-cb/bd
-Multiplying and dividing fractions - -a/b * c/d = a*c/b*d AND a/b / c/d =
a/b/c/d = ad/bc
-Equal To - -=
-Less Than - -<
-Greater Than - ->
-greater than or equal to - -≥
-less than or equal to - -≤
-Rounding - -Expressing a number to the nearest thousandth, hundredth,
tenth, one, ten, hundred, thousand, and so on as directed.
-Whole Number - -The numbers {0, 1, 2, 3, ...} etc.
There is no fractional or decimal part. And no negatives.
-Estimates - -Find a number close to the exact answer
-Decimals - -A fraction written in a special form. For example, instead of 1/2
you write 0.5
-Mixed numbers - -A number composed of a whole number and a fraction
-Factoring numbers - -To break it up into numbers that can be multiplied
together to get the original number
-Divisibility Rules - -That you are able to divide a number evenly
, -greatest common factor - -The largest factor that two or more numbers
have in common.
-least common multiple - -The smallest multiple (other than zero) that two
or more numbers have in common.
-Integers - -whole numbers and their opposites
-real numbers - -All numbers on the number line
-Order of operations - -PEMDAS
-Absolute Value - -The distance a number is from zero on a number line
-Ratios - -a comparison of two quantities using division
-Percentages - -percent/100 * whole
-Proportional ratios - -two ratios are equal
a/b = c/d OR a:b = c:d
-Percent of change - -new-old/old x 100
-markup - -selling price - cost
-Markup rate - -markup/cost
-discount - -price*discount
-selling price - -original price-discount
-variable - -letter that represents unspecified numbers
-tax - -tax rate * taxable amount
-distributive property - -a(b+c)=ab+ac
-Polynomial - -A monomial or the sum of monomials
-systems of equations - -two or more equations that work together
-equations - -the values of two mathematical expressions are equal
-functions - -a rule to go from one number to another number
-distance from a to b - -√(x2 − x1)^2 + (y2 − y1)^2
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