File:Foam paper fraction pies.JPG
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Summary
[edit]DescriptionFoam paper fraction pies.JPG |
English: Two mathematics teachers are evaluating a new teaching tool under development. The tool, a set of pie-shaped models of foam paper, is designed to help students to understand fractions.
The size of the pies have been chosen carefully so that it should be handy for children. Different colors designate fractions with different denominators in their simplest form. On the left, you can see a series of calculations with fractions (from top to bottom): 19/16 + 2/8 (pink), 10/12+2/12 (orange), 1/2+2/4 (brown), 3/4+2/12 (pink and orange), 8/16+2/12+4/12 (brown, orange and blue), 3/9+3/12+1/6+3/12 (blue, pink and purple), 1-3/12 (green and pink), 1/2+1/2-1/3 (brown and blue). The result of the 3/9+3/12+1/6+3/12 operation is rather close to 1, but not so much that the gap would be negligible. This is an important aid for the students, so that they do not assume equalities that do not hold, however, it poses a constraint on the available fractions in the set.English: Foam paper fraction pies |
Date | |
Source | Own work |
Author | Bernát Kalló |
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This image was uploaded as part of European Science Photo Competition 2015. |
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current | 22:46, 30 November 2015 | 3,264 × 2,448 (2.27 MB) | Cie (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot SX160 IS |
Exposure time | 1/20 sec (0.05) |
F-number | f/3.5 |
ISO speed rating | 500 |
Date and time of data generation | 23:07, 25 November 2015 |
Lens focal length | 5 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 23:07, 25 November 2015 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 23:07, 25 November 2015 |
Meaning of each component |
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APEX shutter speed | 4.3125 |
APEX aperture | 3.625 |
APEX exposure bias | 0 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
GPS tag version | 0.0.3.2 |
Rating (out of 5) | 0 |