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Commented Solution – Reading and Interpretation of Ruler or Gauge in Millimeter Exercises

`Results of the list of exercises`

Results and Comments of the Exercises List: Exercises of reading and interpretation of ruler or line gauge in millimeter

exercise
observation
1
1 cm
or
10 mm
in the metal-mechanic industry it is usual the scale in millimeter, but in other areas of the human knowledge, the furniture industry or construction for example, the scale in centimeter is more used (Brazil).
2
2.5 cm
or
25 mm
3
1.1 cm
or
11 mm
4
0.1 cm
or
1 mm
observe that the object was placed in the 31 mm mark and moved until the 32 mm mark (32 mm – 31 mm = 1 mm)
5
1.2 cm
or
12 mm
6
1.8 cm
or
18 mm
observe that the object was placed in the 18 mm mark and moved until the 36 mm mark (36 mm – 18 mm = 18 mm)
7
0.4 cm
or
4 mm
observe that the object was placed in the 4 mm mark and moved until the 8 mm mark (8 mm – 4 mm = 4 mm)
8
1.25 cm
or
12.5 mm
observe that the object was placed in the 33 mm mark and passed a little bit of the 45 mm mark. This way we can say that the object has more than 12 mm and less than 13 mm. My interpretation was that it gets more or less in the middle way between the marks, this way, my interpretation that it has half millimeter more than 12 mm (33 mm – 45.5 mm = 12.5 mm). The value 0.5 mm is doubtful, because each person could interpretate one different value (0.4 mm 0.6 mm?).
9
2.6 cm
or
16 mm
observe that the object was placed in the 74 mm mark and moved until the 100 mm mark (100 mm – 74 mm = 26 mm)
10
4.55 cm
or
45.5 mm
observe that the object was placed between the mark 4 mm and 5 mm and got until the 50 mm mark. This way we can say that the object has more than 45 mm and less than 46 mm. My interpretation was that it get more or less in the middle way between the marks, this way, my interpretation that it has half millimeter more than 45 mm (50 mm – 4.5 mm = 45.5 mm). The value 0.5 mm is doubtful, because each person could interpretate one different value (0.3 mm 0.7 mm?).

self assessment program: reading ruler or line gauge in millimeters

Eduardo Stefanelli

Engenheiro por profissão, professor por vocação