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ATI TEAS GUIDE TO MATH | MEASUREMENTS AND CONVERSIONS

March 22, 2019 //  by nursecheung//  Leave a Comment

UNDERSTANDING MEASUREMENTS AND CONVERSIONS

 

PDF DOWNLOADS FROM REVIEW

MEASUREMENTS AND CONVERSIONS – Full Page Slides

MEASUREMENTS AND CONVERSIONS – Multiple Slides

MEASUREMENTS AND CONVERSIONS – Slide with Notes

QUIZ QUESTIONS LISTED AT END OF REVIEW

Measurement and conversion questions are vitally important in any healthcare program, especially in nursing. You will be required to understand how to process these conversions to provide safe and efficient patient care through medication administration or other tasks. Measurement and conversion questions ask applicants to covert units of measurements between the metric system and English system.

ENGLISH SYSTEM CONVERSIONS

The English system of measurement uses weight, volume, and length as units of measure.

  • Weight is measured in ounces, pounds, and tons
  • Volume is measured in ounces, cups, pints, quarts, and gallons
  • Length is measured in inches, feet, yards, and miles

To understand conversions in the English system, you must know the equivalent measures for each step in the given measurement system. Here are some examples of measurement equivalents.

Measurement Type Equivalents  
Weight 16 ounces

2,000 pounds

= 1 pound

= 1 ton

Volume 8 ounces

2 cups

2 pints

4 quarts

= 1 cup

= 1 pint

= 1 quart

= 1 gallon

Length 12 inches

3 feet

5,280 feet

= 1 foot

= 1 yard

= 1 mile




 

METRIC SYSTEM CONVERSIONS 

The metric system of measurement use weight, volume, and length, but it uses a different set of units for measurement.

  • The basic unit of weight measurement is the gram
  • The basic unit of volume measurement is the liter
  • The basic unit of length measurement is the meter

In the metric system, each unit of measurement starts with a prefix that indicates whether the measurement is smaller than the basic unit or larger than the basic unit. Here are some examples of measurement equivalents.

Prefix Measurement Compared to Basic Unit Weight Volume Length
Kilo- 1,000 times Kilogram (kg) Kiloliter (kL) Kilometer (km)
Hecto- 100 times Hectogram (hg) Hectoliter (hL) Hectometer (hm)
Deka- 10 times Dekagram (dag) Dekaliter (daL) Dekameter (dam)
Basic Unit Basic Unit Gram (g) Liter (L) Meter (m)
Deci- 1/10 Decigram (dg) Deciliter (dL) Decimeter (dm)
Centi- 1/100 Centigram (cg) Centiliter (cL) Centimeter (cm)
Milli- 1/1,000 Milligram (mg) Milliliter (mL) Millimeter (mm)

 

UNDERSTANDING CONVERSIONS BETWEEN SYSTEMS 

To convert between measurements in either English and metric systems, you need to know the approximate equivalents between different units. Here are some examples of measurement equivalents.

English Measurement Metric Equivalent
1 kilogram Approximately 2.2 pounds
1 liter Approximately 1 quart
2.5 centimeters Approximately 1 inch
1 meter Approximately 1 yard




TEMPERATURE CONVERSIONS 

In the English system of measurement, temperature is measured on the Fahrenheit scale. In the metric system of measurement, temperature is measured on the Celsius scale. Here are some examples of measurement equivalents.

Celsius (Metric) Fahrenheit (English)
Freezing Point 0 32
Body Temperature 37 98.6
Boiling Point 100 212

 

To obtain an approximation of Celsius Temperature from a Fahrenheit Measurement, subtract 30 and then divide the total by 2.

MEASUREMENT TOOLS ON THE ATI TEAS

Measurement tools are tested on the ATI TEAS using three categories, based on weight, volume, or length.

  • Measurement tools for weight
    • Scales are used traditionally and vary in degrees of accuracy
  • Measurement tools for volume
    • Pipettes are measuring tubes or drops to measure small amounts of liquid with high precision
    • Measuring cups, flasks, and beakers provide less precise measurements for larger amounts of liquid
    • Graduated cylinders vary in size and are less precise than pipettes but more precise than measuring cups, flasks, and beakers
  • Measurement tools for length
    • Calipers are the most precise measuring tool and take measurements using two points
    • Rulers are the next most precise tool, followed by yardsticks and metersticks
    • Tape measures are used for measuring long distances
    • Odometers measure the distance traveled by a vehicle and would be appropriate for the measurement taken in miles or kilometers

ATI TEAS Math Measurements and Conversions

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  1. Question 1 of 8
    1. Question

    A powdered chemical must be measured to the nearest 1/4 of a pound.

    Which of the following is the most appropriate measurement tool for this task?

    Correct

    A scale is the appropriate measuring tool for measuring weight. Graduated cylinders and beakers are used to measure volume, while yardsticks are used to measure length.

    Incorrect

    A scale is the appropriate measuring tool for measuring weight. Graduated cylinders and beakers are used to measure volume, while yardsticks are used to measure length.

  2. Question 2 of 8
    2. Question

    Which of the following is an approximate metric quantity for the volume of a glass of water?

    Correct

    A glass of water is best approximated by a measurement of about half a liter, or 0.5 L. The measurements of 10 mL and 0.10 cL are equal and are both too small. The measurement of 1 kL too large.

    Incorrect

    A glass of water is best approximated by a measurement of about half a liter, or 0.5 L. The measurements of 10 mL and 0.10 cL are equal and are both too small. The measurement of 1 kL too large.

  3. Question 3 of 8
    3. Question

    Which of the following metric units of measurement is most reasonable to measure the weight of a full tube of a cream medication?

    Correct

    A full tube of a cream medication would most likely by measured in grams. The unit of milligrams would be too small. Hectogram and kilograms units would be too large.

    Incorrect

    A full tube of a cream medication would most likely by measured in grams. The unit of milligrams would be too small. Hectogram and kilograms units would be too large.

  4. Question 4 of 8
    4. Question

    A builder must measure a steel rod exactly 5 inches long for a building project. Which of the following measurement tools is appropriate for this task?

    Correct

    A ruler would be most suited for measuring a length in inches. A yardstick would be too large, so C is incorrect.

    Incorrect

    A ruler would be most suited for measuring a length in inches. A yardstick would be too large, so C is incorrect.

  5. Question 5 of 8
    5. Question

    A technician must measure exactly 6 ounces of a liquid to add to a medical preparation. It is important for the measurement to be as precise as possible. Which of the following measurement tools is most appropriate for this task?

    Correct

    The volume of a liquid is best measured by a graduated cylinder or beaker, among the choices listed here. Graduated cylinders generally provide more precise measurements than beakers, so a graduated cylinder would be the most appropriate tool for this task.

    Incorrect

    The volume of a liquid is best measured by a graduated cylinder or beaker, among the choices listed here. Graduated cylinders generally provide more precise measurements than beakers, so a graduated cylinder would be the most appropriate tool for this task.

  6. Question 6 of 8
    6. Question

    Which of the following is the number of pints in 3 gallons?

    Correct

    A gallon consists of 4 quarts, and there are 2 pints in each quart. Since 4 x 2 = 8, there are 8 pints in each gallon. Multiply 3 gallons by 8 pints: 3 x 8 = 24. There are 24 pints in 3 gallons.

    Incorrect

    A gallon consists of 4 quarts, and there are 2 pints in each quart. Since 4 x 2 = 8, there are 8 pints in each gallon. Multiply 3 gallons by 8 pints: 3 x 8 = 24. There are 24 pints in 3 gallons.

  7. Question 7 of 8
    7. Question

    If a piece of wood measure 25.4 centimeters in length, which of the following is the wood’s approximate length in English measurement? (Note: 1 inch  2.52 centimeters)

    Correct

    Set up a proportion to determine the missing measurement. Cross multiply to solve:
    1 inch / 2.54 centimeters = x inches / 25.4 centimeters
    2.54 x x = 1 x 25.4
    2.54x = 25.4
    x = 25.4/2.54
    x = 10
    The wood measures approximately 10 inches.

    Incorrect

    Set up a proportion to determine the missing measurement. Cross multiply to solve:
    1 inch / 2.54 centimeters = x inches / 25.4 centimeters
    2.54 x x = 1 x 25.4
    2.54x = 25.4
    x = 25.4/2.54
    x = 10
    The wood measures approximately 10 inches.

  8. Question 8 of 8
    8. Question

    Which of the following is the number of centimeters in 1.46 meters?

    Correct

    Convert the number of meters to centimeters. One meter equal 100 centimeters. Multiply 1.46 x 100 = 146.

    Incorrect

    Convert the number of meters to centimeters. One meter equal 100 centimeters. Multiply 1.46 x 100 = 146.




 





Category: ATI TEAS MATH, ATI TEAS Testing, Uncategorized

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