1. Standard and Metric Measuring
Review the Basics

2. Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Two measuring systems.
Standard or Customary System (Inches)
Based on Whole Numbers and Fractional parts of
Metric or International System (Millimeters, Centimeters)
Based on the Power of 10
Three countries have not officially adopted the International System of Units as their primary or sole system of measurement: Liberia, Myanmar, and the United States. The U. S. has switched to Metric with
Sporting Events - Olympics
Military
Medicine
Scientific studies
At this time, Manufacturing; Transportation; and Construction Industries; are primarily using the U.S. Customary system. In certain sectors, the conversion is obvious (i.e. – Automobiles). However, in these industry areas the changes have not been as complete.
This is the reasoning for studying both measurement systems used in the United States.

3. Introduction to Standard and Metric Measurement
Steps in Using the
Standard System
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
1. Find out how many parts the inches are divided into.
Count the spaces in 1 inch.
This number will be the denominator.
2. Count the number of whole inches.
Write down the number.
3. Count the number of spaces after the last whole inch.
This number will be the numerator.
4. Reduce fraction, if necessary.
Hint: If the numerator is a odd number it is reduced.

4. Summary Review What to remember about the Standard/ Customary System
Halving or doubling units.
Number of units between Whole number 8, 16, 32, or 64
Fractions used – 1 / 16, 1 / 8, 1 / 4, 1 / 2
Can count each line and reduce the fraction
Count line patterns (1 / 8”, 1 / 4”).
Don’t forget the whole number.

5. 1 What type of Ruler do we have? Standard or Metric? Don’t know?
Count the number of lines between whole numbers. 1 3 5 7 9 11 13 15 2 6 10 14 4 12 8 1 16

6. 1 Standard So what type of Ruler do we have?
A ruler that measures in 16ths of an inch.
Did you know that 8, 16, 32 and 64 are doubling units? 1 3 5 7 9 11 13 15 2 6 10 14 4 12 8 1
So if you count 8, 16, 32 or 64 lines on other rulers you will still be in the STANDARD SYSTEM FOR MEASURING. 16

7. What is the measurement of each line, reduced?1
1/16
2/16
1/8
3/16
5/16
7/16
9/16
11/16
13/16
15/16
16/16
8/8
4/4
2/2
4/16
2/8
1/4
6/16
3/8
8/16
4/8
2/4
1/2
10/16
5/8
12/16
6/8
3/4
14/16
7/8

8. Let’s measure!
1/8, 5/16, 5/8, 13/16
5/16
13/16
1/8
2/16
5/8
10/16 1

9. Steps in Using the Metric or International System
Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Steps in Using the Metric or International System
Count the number of whole centimeters (cm).
These are the longer lines with numbers on the ruler.
2. Count the number of lines after the whole number.
The smaller lines on the ruler, which are millimeters (mm).
3. Put measurement in correct terms.
Are you measuring in mm or cm?

10. What to remember about the Metric System:
Summary Review
What to remember about the Metric System:
Each line is a millimeter and every 10 lines is a centimeter.
Every 100cm = 1 meter.

11. 1 2 3 What type of Ruler do we have? Standard or Metric? Don’t know?
Count the number of lines between whole numbers. 1 2 3 4 5 6 7 8 9 10
The zero mark for this ruler is the edge. Always check to find the zero mark. 1 2 3

12. So what type of Ruler do we have? A ruler that measures in mm and cm.
Metric
A ruler that measures in mm and cm. 1 2 3 4 5 6 7 8 9 10
The zero mark for this ruler is the edge. Always check to find the zero mark. 1 2 3

13. What is the measurement of each line, in mm?
What is each line in cm?
1mm = 0.1cm 2mm = 0.2cm 3mm = 0.3cm 4mm = 0.4cm 5mm = 0.5cm
6mm = 0.6cm 7mm = 0.7cm 8mm = 0.8cm 9mm = 0.9cm 10mm = 1cm
3mm
7mm
1mm
5mm
9mm
2mm
6mm
4mm
8mm 1
10mm 2 3

14. Let’s measure!
7mm, 1.3cm, 23mm, 2.7cm
7mm
1.3cm
23mm
2.7cm 1 2 3

15. End of Measuring Review
It’s time to get ready for the test.
What questions do you have?