1. Introduction to Measurement
Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Introduction to Measurement

2. Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Standard (Customary) System
Inches
Fractions
The Whole Inch 2
First Half Second Half
¼ ¾ 4
Notice that all denominators are even numbers. Therefore, if your numerator is also even, then your fraction can be reduced.
1/ / / /8 8
1/16 3/ / / / / / /16 16

3. Introduction to Standard and Metric Measurement
Steps in Using the
Standard (Customary) System
Introduction to Standard and Metric Measurement
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.

4. Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
Let’s Review 7 1
Find Numerator
Step 3
Count Whole Inches
Step 2 16
Step 1
Find Denominator
Reduce Fraction, If Necessary
Step 4

5. Introduction to Standard and Metric Measurement
Let’s Practice
Introduction to Standard and Metric Measurement
Gateway To Technology
Unit 1 – Lesson 1.3 – Dimensioning
What is the distance from the end of the ruler to A?
¼ in.
What is the distance from the end of the ruler to B?
15/16 in.
What is the distance from the end of the ruler to C?
1 ¾ in.
What is the distance from the end of the ruler to D?
2 3/8 in.
What is the distance from the end of the ruler to E?
3 1/16 in.