2. Measuring Equipment Units of Measurement Whole Numbers (1, 2, 3) Fractions (1/8”) Decimals (0.392) Metric (1 mm)

3. Measuring Equipment Introduction British Imperial System (U.S.) Metric System

4. Measuring Equipment British System Fractions (rulers) Inches Feet yards

5. Measuring Equipment Fractions A fraction is a number that expresses part of a group. Fractions are written in the form of a/b, where a and b are whole numbers, and the number b is not 0. The number a is called the numerator, and the number b is called the denominator.

6. Measuring Equipment Example The fraction 4/6 represents the shaded portion of the circle below. There are 6 pieces in the group, and 4 of them are shaded.

7. Measuring Equipment Example #2 The fraction 3/8 represents the shaded portion of the circle below. There are 8 pieces in the group, and 3 of them are shaded.

8. Measuring Equipment Some Rules Always reduce the fraction to the lowest common denominator.

9. Measuring Equipment Questions Any questions on what a fractions is?

10. Measuring Equipment Fractions on Rulers Top = metric Bottom = fractions

11. Measuring Equipment Ruler divisions

12. Measuring Equipment Ruler divisions Rulers can be divided into: Always reduce the fraction to the lowest common denominator 1/21/41/8 1/161/321/64

13. Measuring Equipment Ruler fractions

14. Measuring Equipment Put it all together

15. Measuring Equipment Questions Questions on fractions or rulers?

16. Measuring Equipment Fractions Quiz

17. Measuring Equipment Answers A – 8ths B – 1” C – 1/2” D – 1/4” E – 1/8” F - 16ths G – 1/8” H – 1/8” I – 1/16” J – 1/32” K – 1/64