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