Reading-a-Ruler
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School
Miami Dade College, Miami *
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Course
MISC
Subject
English
Date
Feb 20, 2024
Type
Pages
10
Uploaded by SuperPencil5227
Introduction to Technology and Engineering
Unit 1:
measuring and laying out dimensions Terminal Objective 1.2:
read dimensions using a standard ruler Performance Objective:
Given a diagram of a standard ruler with extension and dimension lines, read dimensions to a 16
th
of an inch, using proper or mixed fractions in their lowest terms, with a minimum score of 90% correct. Enabling Objectives: 1. define the following terms: whole numbers, proper fractions, improper fractions, mixed fractions, numerator, and denominator 2. identify extension lines, dimension lines, arrow heads, and dimensions 3. explain how to identify units on a standard ruler 4. reduce fractions to their lowest terms 5. change improper fractions to proper fractions Laboratory Hardware: None Learning Activities
: 1. Participate in PowerPoint Presentation 1.2, Read Dimensions Using a Standard Ruler. 2. Complete Activity Sheet 1.2, Read Dimensions Using a Standard Ruler. 3. Play the measuring game located at http://www.rickyspears.com/rulergame
/ Continue playing until you are able to score a minimum of 1000 points. Alternative Learning Activities
: For additional practice with identifying and reducing fractions visit the following web sites: http://www.visualfractions.com/IdentifyCircles/identifycircles.html
http://www.visualfractions.com/IdentifyLines/identifylines.html
http://www.sheppardsoftware.com/mathgames/fractions/reduce_fractions_shoot.htm
Formative Evaluation: The worksheet, Activity Sheet 1.2, Read Dimensions Using a Standard Ruler, will be used to assess student progress. The answers to Activity Sheet 1.2 are as follows: 1. P 5. P 2. I 6. P 3. W 7. I 4. M 8. W
Answers to activity sheet 1.2 continued: 9. N 10. D 11. M 12. I 13. P 14. °
±
16. ²
³
15. ´
µ
17. ²
³
18. 1
²
³
21. 2
²
µ
19. 4 22. 1
²
²¶
20. 2
°
±
23. 4
²
±
24. D 25. B 26. C 27. D 28. B 29. C 30. A 31. 8ths 32. 16ths 33. 32nds 34. °
µ
37. 1
°
±
35. 4
²
±
38. 2
²
³
36. 2
²
±
39. °
±
40. ´
µ
43. °
²¶
41. 1
´
µ
44. 1
²
µ
42. 3
°
±
45. 5
´
µ
Summative Evaluation: Two forms of summative assessments are available for this lesson, an end of lesson quiz and several test items for a unit or end-of-level test. The quiz on the following page, 1.2—Read Dimensions Using a Standard Ruler, will be used to measure the performance objective for the lesson. The answers for the quiz are as follows: A. 2
´
µ
F. 2
²
µ
K. ·
²¶
P. 1
·
²¶
B. 1
²
±
G. 1
°
±
L. ²°
²¶
Q. °
²¶
C. ·
µ
H. 1 M. 1
²
³
R. 1
²´
²¶
D. °
µ
I. °
±
N. ²
³
S. 1
¸
²¶
E. ²
µ
J. ·
µ
O. 2 T. 1
·
µ
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Performance Assessment 2.1 Read Dimensions Using a Standard Ruler Name:
Date:
Period:
Directions:
In the spaces provided below, labeled A-T, write the corresponding dimension graphically identified on the ruler. To be identified as correct, all answers must be given as whole numbers, or as proper fractions or mixed fractions in their lowest terms. A. B. C. D. E. F. G. H. I. J. K. L. M. N. O. P. Q. R. S. T.
Summative Evaluation (continued): The following test items could be used to measure the enabling and terminal objectives on a unit or end-of-level test: 1. The number below the division bar in a fraction is referred to as the: a.
denominator. b. dividend. c. numerator. d. remainder. 2. When the number above the division bar in a fraction is less than the number below the bar, it is referred to as a: a. improper fraction. b. integer fraction. c. mixed fraction. d.
proper fraction. 3. A whole number with a fraction is referred to as: a. improper fraction. b. integer fraction. c.
mixed fraction. d. proper fraction. 4. Which of the following represents ²³
²¶
as a proper or mixed fraction in lowest terms? a.
°
±
b. °
²¶
c. ¶
µ
d. 1
°
±
5. Which of the following represents ²³
°´
as a proper or mixed fraction in lowest terms? a. ²³
²
b. °²
µ
c. ±
²
d.
1
°
²
6. In the graphic below, which of the following drawing elements is represented by the letter A? a. arrowhead b. dimension c. dimension line d.
extension line 7. In the graphic below, what is the dimension represented by X? a. ·
²¶
b. ³°
²¶
c.
1
¶
°´
d. 1
¶
µ
8. In the graphic below, what is the dimension represented by X? a. ³
°´
b.
°
³
c. °
²
d. 4
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Activity sheet 1.2: Read Dimensions Using a Standard Ruler Name
_______________________________________ Date
___________ Period
______ Directions:
Match the numbers below with the terms below in the right column that best identifies the type of number. Write the corresponding letter for the term in the space provided next to the number. _____ 1. 13
32
_____ 5. 8
5
I = Improper Fraction M = Mixed Fraction P = Proper Fraction W = Whole Number _____ 2. 8
9
_____ 6. 16
9
_____ 3. 6
_____ 7. 4
6
_____ 4. 16
3
3
_____ 8. 3
Directions:
Match the descriptions associated with fractions below in the left column with their terms listed below in the right column. Write the corresponding letter for the term in the space provided next to the description. _____ 9. The number above the division bar _____ 10. The number below the division bar _____ 11. A whole number with a fraction _____ 12. When the number above the division bar is greater than the number below the bar _____ 13. When the number below the division bar is greater than the number above the bar D = Denominator I = Improper Fraction M = Mixed Fraction N = Numerator P = Proper Fraction W = Whole Number
Directions:
Reduce the following fractions to their lowest terms and write your answer in the space provided. 14. 8
6
_____ 16. 8
4
_____ 15. 16
10
_____ 17. 32
16
_____
Directions:
Change the following fractions to mixed fractions or whole numbers, reduce them to their lowest terms, and write your answer in the space provided. 18. _____ 21. _____ 19. _____ 22. _____ 20. 2
_____ 23. 3
_____ Directions:
Match the definitions of dimensioning elements below in the left column with their terms listed below in the right column. Write the corresponding letter for the term in the space provided next to the definition. _____ 24. Fine, solid, straight lines that align with the features on the object to be specified _____ 25. Fine, solid, straight lines which point to extension lines, and indicate a measurement on the object itself _____ 26. Numerical measurements of a part written in conjunction with dimension lines A = Arrowheads B = Dimension lines C = Dimensions D = Extension lines E = Object lines Directions:
Using the graphic below, identify each of the following dimension elements listed below by writing the corresponding letter in the space provided. 27. Arrowhead 28. Dimension 29. Dimension line 30. Extension line
Directions:
Identify the units of measure (8ths, 16ths, 32nds, or 64ths) for each ruler below and write your answer in the space provided. 31. What are the units of measure represented on the ruler in the graphic below? _________ 32. What are the units of measure represented on the ruler in the graphic below? _________ 33. What are the units of measure represented on the ruler in the graphic below? _________
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Directions:
In the spaces below, write the corresponding measurements represented in the graphics as a proper fractions or mixed fractions in their lowest terms. 34. A. __________ 35. B. __________ 36. C. __________ 37. D. __________ 38. E. __________ 39. F. __________ 40. G. __________ 41. H. __________ 42. I. __________ 43. J. __________ 44. K. __________ 45. L. __________