This guide provides useful resources for a wide variety of math topics. It is targeted at students enrolled in a math course or any other Centennial course that requires math knowledge and skills.

- Welcome
- Learning Math Strategies (Online)Toggle Dropdown
- Study Skills for MathToggle Dropdown
- Simply Math
- Business MathToggle Dropdown
- Hospitality MathToggle Dropdown
- Place Value in Decimal Number Systems
- Arithmetic Operations
- Order of Operations
- Basic Laws
- Prime Factorisation and Least Common Multiple
- Fractions
- Decimals
- Percents
- Exponents
- Units of Measures
- Fluid Ounces and Ounces
- Metric Measures
- Yield Percent
- Recipe Size Conversion
- Ingredient Ratios
- Food-Service Industry Costs

- Engineering MathToggle Dropdown
- Basic Laws
- Order of Operations
- Prime Factorisation and Least Common Multiple
- Fractions
- Exponents
- Radicals
- Reducing Radicals
- Factoring
- Rearranging Formulas
- Solving Linear Equations
- Areas and Volumes of Figures
- Congruence and Similarity
- Functions
- Domain and Range of Functions
- Basics of Graphing
- Transformations
- Graphing Linear Functions
- Graphing Quadratic Functions
- Solving Systems of Linear Equations
- Solving Quadratic Equations
- Solving Higher Degree Equations
- Trigonometry
- Graphing Trigonometric Functions
- Graphing Circles and Ellipses
- Exponential and Logarithmic Functions
- Complex Numbers
- Number Bases in Computer Arithmetic
- Linear Algebra
- Calculus
- Set Theory
- Modular Numbers and Cryptography
- Statistics
- Problem Solving Strategies

- Upgrading / Pre-HealthToggle Dropdown
- Basic Laws
- Place Value in Decimal Number Systems
- Decimals
- Significant Digits
- Prime Factorisation and Least Common Multiple
- Fractions
- Percents
- Ratios and Proportions
- Exponents
- Radicals
- Reducing Radicals
- Metric Conversions
- Factoring
- Solving Linear Equations
- Solving Quadratic Equations
- Functions
- Domain and Range of Functions
- Polynomial Long Division
- Exponential and Logarithmic Functions
- Statistics

- Nursing Math
- Arithmetic Operations
- Order of Operations
- Place Value in Decimal Number Systems
- Decimals
- Fractions
- Percents
- Ratios and Proportions
- Nutrition Labels
- Interpreting Drug Orders
- Oral Dosages
- Dosage Based on Size of the Patient
- Parenteral Dosages
- Intravenous (IV) Administration
- Infusion Rates for Intravenous Piggyback (IVPB) Bag
- General Dosage Rounding Rules

- Transportation MathToggle Dropdown
- PhysicsToggle Dropdown

- When converting body weight from lb to kg, round it to the
**nearest****tenth**. - For fluid oral volume and temperature, round it to the
**nearest tenth**as well.

**Note:** tenth stands for the first place after the decimal point. Refer to **Decimals** for detailed information.

**Example: **

**30 lb = 13.6078 kg**

To round 13.6078 to the nearest tenth, we look at the number on hundredth. If this number is in the range of 5 to 9, we round it **up ** by adding 1 to the tenth. Otherwise, we round it **down **to keep the tenth unchanged.

Since 0 is on hundredth, we round it **down **to 13.6:

**30 lb = 13.6 kg**

- Round unscored tablets to the
**nearest whole number**. - Scored tablets maybe broken in half, so numbers of scored tablets should be rounded to the
**nearest half tablet**.

**Example 1: Unscored**

Order: 600 mcg

In hand: 250 mcg/tablet

Dosage: **2.4 tablets**

To round 2.4 to a whole number, we check the number on tenth. Since it is 4 on tenth, round **down** to **2 tablets**.

**Example 2: Scored**

Order: 600 mcg

In hand: 250 mcg/tablet

Dosage: **2.4 tablets**

Since 2.4 is between 2.25 and 2.50, 2.5 is the nearest half. Round it **up** to **2.5 tablets**.

- Round to the
**nearest hundredth**if the volume is less than 1 mL; - Round to the
**nearest tenth**if the volume is greater than 1 ml.

**Example 1:**

**0.345 mL**

0.345 is less than 1, so it should be rounded to the nearest hundredth. On thousandth it is a 5, so round it **up **to **0.35 mL**.

**Example 2:**

**1.345 mL**

1.345 is greater than 1, so it should be rounded to the nearest tenth. On hundredth it is a 4, so round it **down **to **1.3 mL**.

- Round to the
**nearest whole number**for piggyback infusion, such as flow rate in gtt/min or mL/hr, and drop factor in gtt/mL as drops cannot be fractionated. - Round to the
**nearest tenth**for dose -based flow rate such as mg/mL.

**Examples:**

**15.25 gtt/min** should be rounded to **15 gtt/min**;

**249.71 mL/hr **should be rounded to **250 mL/hr**;*

**20.612 gtt/mL** should be rounded to **21 gtt/mL**;

**0.625 mg/mL** should be rounded to** 0.6 mg/mL.**

**Note: **In the second example, we need to round 249.71 to a whole number. It is 9 on the place of ones, so when rounding it up we get 10, which means we will write 0 on the place of ones and add one to the place of tens. Therefore we finally got 250.

- Last Updated: Mar 18, 2024 3:47 PM
- URL: https://libraryguides.centennialcollege.ca/mathhelp
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