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What does that mark mean?

Learn how to read and use standard (inches) and metric (centimeters/millimeters) measurements on a ruler. Discover the patterns and strategies for naming points accurately in both systems.

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What does that mark mean?

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  1. ? ? What does that mark mean? Reading a Ruler ? ?

  2. There are 2 basic kinds of rulers. Standard (inches) Metric (centimeters/millimeters)

  3. Metric (centimeters/millimeters) measurements are read and written as decimals. Standard (inches) measurements are read and written as fractions.

  4. Reading a Standard Ruler

  5. Fill in the ruler below. Let's focus on the 0 to 1 part. 1/8 ________________________________________________________________________ 1/4____________________________________ 1/2___ ___ ___ ___ ___ ___ Units01 ___ ___ ___ ___ ___

  6. 1/8 __________ __ 1/4______ 1/2__ Units0 1 Use your pen to draw these lines... red

  7. 1/8 __________ __ 1/4______ 1/2__ Units0 1 Now, start at 0 and make "jumps" until you get to 1.

  8. 1/8 __________ __ 1/4______ 1/2__ Units0 1 How many "jumps" did it take? 8

  9. 1/8 __________ __ 1/4______ 1/2__ Units0 1 So EACH of these marks are...

  10. 1/8 __________ __ 1/4______ 1/2__ Units0 1

  11. 1/8 __________ __ 1/4______ 1/2__ Units0 1

  12. 1/8 __________ __ 1/4______ 1/2__ Units0 1 Can this reduce?

  13. 1 1 1 1 1 1 1/8 __________ __ __ 1/4______ __ 1/2__ __ Units0 1

  14. Are each of these marks 1/8? How do you know? Answer questions 10 and 11 on your worksheet. 0 1

  15. Reading a Metric Ruler

  16. EVERY mark is called a millimeter.

  17. 11 12 1 2 3 4 7 10 5 6 8 9 13 14 16 15 Label each millimeter along the TOP of the ruler. millimeter.

  18. What patterns do you notice that would give you a good strategy for naming this point in millimeters?

  19. What patterns do you notice that would give you a good strategy for naming this point in millimeters?

  20. Fill in the ruler below. Let's focus on the 0 to 1 part.

  21. Use your pen to draw these lines... red

  22. Each of the longest marks represent one centimeter.

  23. Now, start at 0 and make "jumps" until you get to 1.

  24. How many "jumps" did it take? 10

  25. So EACH of these marks are...

  26. 1.3 1.2 .1 .2 .3 .4 .7 .6 .8 .9 1.1 .5 1

  27. What patterns do you notice that would give you a good strategy for naming this point in centimeters?

  28. What patterns do you notice that would give you a good strategy for naming this point in centimeters?

  29. Fill in the rest of both rulers and answer the questions.

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