Biol 205 Placement Test - Study Guide Q&A
Updated 2024/2025 Complete
Square - answer✔✔A number multiplied by itself
Fraction - answer✔✔Represent some part of a whole
Square root - answer✔✔A value that can be multiplied by itself to give the original number.
Fractions - answer✔✔a number that expresses parts of a whole or a group
Reducing Fractions - answer✔✔reduce by a common factor
Multiplying Fractions - answer✔✔To multiply fractions, multiply the numerators and multiply
the denominators
Dividing Fractions - answer✔✔Invert (reciprocal) the second fraction and multiply
Adding Fractions - answer✔✔change the fractions into the lowest common denominator and add
the numerators
mixed number - answer✔✔a number made up of a whole number and a fraction
Subtracting Fractions - answer✔✔Find LCD and subtract numerators
Decimals - answer✔✔Represent multiples of 10.
Converting decimals to fractions - answer✔✔The value of 0.25 represents 2/10 + 5/100
Find common denominator
2/10 x 10/10 = 20/100
20/100 + 5/100 = 25/100 —> 1/4
Adding Decimals - answer✔✔Line up the decimal points and add normally (ex.
23.62+8.369=31.989)
Subtracting Decimals - answer✔✔Line up the decimal points and subtract normally (ex. 20.02-
1.36=18.66)
, Multiplying Decimals - answer✔✔Multiply the #s and then move the decimal point the total # of
places in the answer
Dividing Decimals - answer✔✔Move the decimal to the right on both numbers until there is
nothing to the right of the decimal
Exponents - answer✔✔The number that is small and raised to show how many times to multiply
the number by itself.
scientific notation - answer✔✔a method of expressing a quantity as a number multiplied by 10 to
the appropriate power
Ratios - answer✔✔Express a relationship between two or more numbers
Proportions and ratios - answer✔✔a/b =c/d,
then a/c =b/d
A/B = C/D,
then A+B/B = C+D/D is equivalent to A/B + A/B = C/D + C/D
directly proportional - answer✔✔A property of two variables that change in the same direction at
a smaller rate
Inversley Proportional - answer✔✔Change at similar rate, but in opposite direction
percentage - answer✔✔a part of a whole expressed in hundredths
mean - answer✔✔"Average" number; found by adding all data points and dividing by the
number of data points
Median - answer✔✔The middle number; found by ordering all data points and picking out the
one in the middle ( or if there are two middle numbers, taking the mean of those two numbers).
Mode - answer✔✔The most frequent number— that is, the number that occurs the highest of
times
metric measurement - answer✔✔a system of measurement based on multiples of 10 (liter, gram,
meter)
Basic unit of length - answer✔✔Meter (m)
Basic unit of mass - answer✔✔Kilogram (kg)
basic unit of volume - answer✔✔Liter (L)
basic unit of temperature - answer✔✔celsius
kilo- (k) - answer✔✔0.001
Updated 2024/2025 Complete
Square - answer✔✔A number multiplied by itself
Fraction - answer✔✔Represent some part of a whole
Square root - answer✔✔A value that can be multiplied by itself to give the original number.
Fractions - answer✔✔a number that expresses parts of a whole or a group
Reducing Fractions - answer✔✔reduce by a common factor
Multiplying Fractions - answer✔✔To multiply fractions, multiply the numerators and multiply
the denominators
Dividing Fractions - answer✔✔Invert (reciprocal) the second fraction and multiply
Adding Fractions - answer✔✔change the fractions into the lowest common denominator and add
the numerators
mixed number - answer✔✔a number made up of a whole number and a fraction
Subtracting Fractions - answer✔✔Find LCD and subtract numerators
Decimals - answer✔✔Represent multiples of 10.
Converting decimals to fractions - answer✔✔The value of 0.25 represents 2/10 + 5/100
Find common denominator
2/10 x 10/10 = 20/100
20/100 + 5/100 = 25/100 —> 1/4
Adding Decimals - answer✔✔Line up the decimal points and add normally (ex.
23.62+8.369=31.989)
Subtracting Decimals - answer✔✔Line up the decimal points and subtract normally (ex. 20.02-
1.36=18.66)
, Multiplying Decimals - answer✔✔Multiply the #s and then move the decimal point the total # of
places in the answer
Dividing Decimals - answer✔✔Move the decimal to the right on both numbers until there is
nothing to the right of the decimal
Exponents - answer✔✔The number that is small and raised to show how many times to multiply
the number by itself.
scientific notation - answer✔✔a method of expressing a quantity as a number multiplied by 10 to
the appropriate power
Ratios - answer✔✔Express a relationship between two or more numbers
Proportions and ratios - answer✔✔a/b =c/d,
then a/c =b/d
A/B = C/D,
then A+B/B = C+D/D is equivalent to A/B + A/B = C/D + C/D
directly proportional - answer✔✔A property of two variables that change in the same direction at
a smaller rate
Inversley Proportional - answer✔✔Change at similar rate, but in opposite direction
percentage - answer✔✔a part of a whole expressed in hundredths
mean - answer✔✔"Average" number; found by adding all data points and dividing by the
number of data points
Median - answer✔✔The middle number; found by ordering all data points and picking out the
one in the middle ( or if there are two middle numbers, taking the mean of those two numbers).
Mode - answer✔✔The most frequent number— that is, the number that occurs the highest of
times
metric measurement - answer✔✔a system of measurement based on multiples of 10 (liter, gram,
meter)
Basic unit of length - answer✔✔Meter (m)
Basic unit of mass - answer✔✔Kilogram (kg)
basic unit of volume - answer✔✔Liter (L)
basic unit of temperature - answer✔✔celsius
kilo- (k) - answer✔✔0.001
