1. Applying Metrics for Welding Correct & Incorrect Metric Expressions Copyright © Texas Education Agency, 2012. All rights reserved.

2. When a millimeter is less than one, a “0” is shown preceding the decimal point.  Correct0.08 mm  Incorrect.08 mm Copyright © Texas Education Agency, 2012. All rights reserved.

3. A decimal point and a zero are not shown when the millimeter dimension is a whole number.  Correct8 mm  Incorrect8.0 mm Copyright © Texas Education Agency, 2012. All rights reserved.

4. A millimeter dimension with a whole number and a decimal is not shown with a zero following the decimal fraction.  Correct2.2 mm  Incorrect2.20 mm Copyright © Texas Education Agency, 2012. All rights reserved.

5. A metric dimension is given as a decimal fraction rather than a common fraction.  Correct.25 mm  Incorrect¼ mm Copyright © Texas Education Agency, 2012. All rights reserved.

6. Symbols for metric units are shown in lower-case letters in most cases.  Correct6 mm  Incorrect6 MM  Incorrect6 Mm  Incorrect6 mM Copyright © Texas Education Agency, 2012. All rights reserved.

7. Drawings using millimeters will not show the digits separated into groups by commas or spaces.  Correct1547  Incorrect1 547  Correct10289  Incorrect10,289 Copyright © Texas Education Agency, 2012. All rights reserved.

8. When listing multiple measurements, a semicolon is used to separate dimensions in a list.  Correct28 mm; 16 mm; 5.2 mm  Incorrect 28 mm, 16 mm, 5.2 mm Copyright © Texas Education Agency, 2012. All rights reserved.