Medical mathematics & number basics
XXI =
XXI = 10 + 10 + 1 = 21
XXXX does not equal 40. Instead, ___ =
XXXX does not equal 40. Instead, XL = 40
A decimal represents
a fraction of a whole number whose denominator is a multiple of 10
A fraction represents
a part of a whole
Percentages can express
a whole or part of a whole
numerical system
an organized method of counting
factors
the numbers being multiplied.
I
1
X
10
V
5
L
50
D
500
What roles do math play in everyday life?
Alarm clocks Recipe measurements Driving speed Method of payment for goods
An organized method of counting
Numerical system
Most common numerical system
Hindu-Arabic System
IIII does not equal 4. Instead, ____ =
IIII does not equal 4. Instead, IV = 4.
LIIV does not equal 53. Instead, _____ = 53
LIIV does not equal 53. Instead, LIII = 53
MMV =
MMV = 1000 + 1000 + 5 = 2005
What can be done before learning a new mathematical concept to reduce math anxiety
Mentally assess what's already known Review mastered skills Take a break/clear mind Engage your mind Don't procrastinate
Subtract only ____ number from another.
Subtract only one number from another.
How to divide fractions
To divide, first flip the divisor fraction. Then multiply the numerators and multiply the denominators.
VI =
VI = 5 + 1 = 6
VL does not equal 45. Instead, _____ =
VL does not equal 45. Instead, XLV = 40 + 5 = 45.
IC does not equal 99. Instead,
XCIX = 90 + 9 = 99.
XI =
XI = 10 + 1 = 11
If a smaller numeral is placed behind/after a larger numeral, the smaller numeral is_________ to the larger numeral.
added
If the same numeral is placed next to itself, the numerals are ______________
added together
When adding and subtracting, the decimal points must
be aligned
The denominator is the bottom number in the fraction. It tells
how many parts it takes to make a whole
Number parts are __________ and may be converted from one form into another.
interchangeable
steps to multiplying decimals
multiply the factors without aligning decimal points count the total number of digits to the right of the decimal points in the factors place the decimal point so that the answer includes the number of decimal places that you counted in the factors
After finishing a mathematic function, fractions should always be
reduced to the lowest terms
The Roman numeral system uses a series of _____ letters to express numeric values.
seven
If a smaller numeral is placed in front of a larger numeral, the smaller numeral is _________ from the larger numeral.
subtracted
The numerator is the top number in the fraction. It shows
the actual number of parts.
How would 35% be written as a decimal?
0.35
Do not subtract a number from another that is more than _____ times greater.
10 times greater.
With percentages, the whole is always in terms of
100
M
1000
IIX does not equal 8. Instead, _____ =
IIX does not equal 8. Instead, VIII = 8.
IX =
IX = 10 - 1 = 9
number parts
Number parts have a value less than 1. Number parts may be expressed in terms of fractions, decimals, or percentages.
A numerical system developed over 3,000 years ago to express values
Roman numeral system
The Hindu Arabic system uses a set of ___ digits, __-__, to create specific values
Sets of 10 digits 0-9
Subtract only powers of ____, such as I (1), X (10), or C (100). Never subtract V (5), L (50), or D (500).
Subtract only powers of 10, such as I (1), X (10), or C (100). Never subtract V (5), L (50), or D (500).
Place values for decimals are located on which side of the decimal point?
right
divisor
the number by which a quantity will be divided. For example, in the problem 6 ÷ 3, 3 is the divisor.
C
100
Number parts may be expressed in one of the following forms:
Fractions Decimals Percentages
XC =
XC = 100 - 10 = 90
When adding or subtracting, fractions must have the same
denominator
The place values of decimals are located to the _____ of the decimal point on a number line.
right
Examples of mathematics on health care
•calculating medical dosages •reading prescriptions •analyzing test results •taking temperatures •weighing + measuring patients •determining concentration levels •billing + record-keeping
What is math anxiety?
Getting nervous & worried/thinking one cannot understand math
Steps to overcome math anxiety
Have an open mind Create mental energy needed for learning
This system uses a set of 10 digits, 0 through 9, to create specific values.
Hindu-Arabic system
II =
II = 1 + 1 = 2
IV =
IV = 5 - 1 = 4
LD does not equal 450. Instead, ______ =
LD does not equal 450. Instead, CDL = 400 + 50 = 450
how do you multiply fractions
To multiply, first multiply the numerators and then multiply the denominators.
How do you write 49 in Roman numerals?
XLIX
How do you write 17 in Roman numerals?
XVII
Whole numbers
the numbers used to count, beginning with 0, 1, 2, 3, and so on
The same numeral should not be placed next to itself more than _____
three times
Decimal points must be aligned when adding and subtracting.
true
XD does not equal 490. Instead,
CDXC = 400 + 90 = 490
CXV =
CXV = 100 + 10 + 5 = 115
steps to dividing decimals
move the decimal point of the divisor to the right so that it becomes a whole number move the decimal point of the dividend the same number of spaces to the right Divide as usual
