Conversion Factors Flashcards
Ft to in
1ft=12in
Yd to ft
1yd=3ft
Mi to ft
1mi=5280ft
Lbs to oz
1lb=16 oz
PT to c
1pt=2c
Gal to qt
1gal=4qt
t to lb
1t=2000 lb
T
Tera
G
Giga
M
Mega
k
Kilo
h
Hecta
10^12
Tera
10^9
Giga
10^6
Mega
10^3
Kilo
10^2
Hecta
da
Deca/deka
d
Deci
c
Centi
m
Mili
Mu
Micro
n
Nano
10^-9
Nano
10^-6
Micro
10^-3
mili
10^-2
Centi
10^-1
Deci
10^1
Deka/Deca
mm to cm
10 mm=1cm
Mm to in
25.4 mm =1in
Mm to ft
304.8mm to 1 ft
Mm to yd
914.4 mm to 1 yd
Mm to m
1000 mm to 1m
Ft³ to in³
1 ft³=1728 in³
Yd^3 to in^3
1 yd^3=46,656in^3
Gal^3 to in^3
1Gal^3= 231 in^3
Qt^3 to in^3
1qt^3= 57.75 in^3
L to in^3
1L= 61.02 in^3
cc(ml) to in^3
1 cc= .06102in^3
Fl oz to in^3
1 fl oz= 1.80469 in³
g to kg
1000g=1 kg
g to oz
1 oz =28.35g
g to lb
1 lb =453.6 g
C from F
(5/9)(F-32)=C
F from C
F=(9C/5) +32
Correlations
Occur when two or more variables are related to each other, such that a change in one produces a change in the other
Quadratic formula
X=(-b±✓(b^2-4ac))/(2a)
Quadratic formula
x=(-b±✓(b^2-4ac))/(2a)
Thickness of a dime is about
1mm
The width of an average pinkie fingernail is about
1cm
The average adult is 1.5 to 2 __ tall
m
The average adult walks _ km in about 15 min.
1
The weight of one aspirin tablet is about _ g
1
A 5 lb bag of sugar weighs just over _ kg
2
Approximations for ºC
Zero is freezing, 10 is not, 20 is warm, and 30 is hot.
Front-end estimation
In addition of numbers, with more than one digit, the left-most digit carries the highest place value. You ignore all the digits after the first and add.
When to use Front-end estimation
During the addition of groups of numbers.
Estimate the following sum by using front-end estimation: 4720+1429+914
4000+1000=5000
700+400+900= 2000
5000+2000=7000
Estimate the following difference using front-end estimation: 85,374- 35,805.
80,000- 30,000= 50,000
5,000- 5,000=0
300- 800=-500
50,000+0+(-500)=49,500
When do you use front-end estimation?
When estimating operations with groups of numbers.
Estimate the following product by using front-end estimation: 3267x389=
3000x400=1,200,000
Explain estimation by clustering
When adding a group of numbers which are close to or “cluster” around a certain value that is conducive to easy mental computations.
Compatible numbers
Numbers that are conducive to easy mental computations.
Fl oz to ml
29.573ml=1fl oz
Volume of a cylinder
πr²h
Area of trapezoid formula
A=((a+b)/2)(h)
Volume of a sphere
(4/3) πr³
Resistance formula
R=V/I(current)
Inverse proportion formula
Y= k/x
How to find k in inverse proportion formula
K=YX
m³ to yd³
1m³=1.31yd³
Km to mi
1km= .621371 mi
How to solve absolute value equations
|x+2|=9 ?
Solve for both possibilities
X+2=9
X+2= -9
Which numbers are irrational?
Real numbers that can’t be written as fractions.
Never ending decimals
Non-repeating decimals
Examples of irrational numbers
π,
√(2)
√(3)
e
Golden ratio
Mi to km
1 mi = 1.609km
