4 ms·

Is this a thing than only happens in countries that doesn't use the SI? I don't know of anyone that has a problem using m, cm or mm in different circunstances

by Oletros 11y ago

Symbiote 11y ago
Me neither. I remember one of the educational toys my school had, which I played with when I was 5 or 6. We called it "tens, hundreds, units" [1]. There were many 1×1×1cm "units", 10×1×1 "tens", 10×10×1 "hundreds" and a 10×10×10 "thousand". You could fill the hundreds and thousand with water, the thousand obviously being 1L. The British National Curriculum [2] says children - In year 1 (age 5-6) should be able to count centimetres - In year 2, recognise place value, choose appropriate units (cm/m, g/kg, °C etc) and use measuring tools for these - In year 3, to add milli- to that, - In year 4, convert between centimetres and metres, and other units (time and £ and pence) - In year 5, to convert between milli-, centi-, base, and kilo- measures. Calculate square areas in cm² and m² - In year 6, volumes in m³ etc, and converting everything, to three decimal places. (This hasn't changed since the 1960s or something, so it's a shame the country won't get rid of road signs with miles and yards on.) [1] http://www.tts-group.co.uk/shops/tts/Products/PD1723354/Base-Ten-Class-Set/ http://www.tts-group.co.uk/shops/tts/Products/PD1723354/Base... [2] https://www.gov.uk/government/publications/national-curriculum-in-england-mathematics-programmes-of-study/national-curriculum-in-england-mathematics-programmes-of-study https://www.gov.uk/government/publications/national-curricul...
- DanBC 11y ago
  Some people know those as cuisenaire rods. http://www.amazon.co.uk/gp/aw/d/B00074U7SO/ http://www.amazon.co.uk/gp/aw/d/B00074U7SO/ https://en.wikipedia.org/wiki/Cuisenaire_rods https://en.wikipedia.org/wiki/Cuisenaire_rods They're brilliant, but go careful with some of the work books that are available. ("Blue + red = ?" cause confusion.)
marcosdumay 11y ago
Agreed. I simply can not understand how one can be faster with a millimeter-only caliper than with one marked in centimeters and millimeters. He is right that engineering does not use centimeters. But that's for clarity of communication, not for individual efficiency.

Is this a thing than only happens in countries that doesn't use the SI? I don't know of anyone that has a problem using m, cm or mm in different circunstances

by Oletros 11y ago

Is this a thing than only happens in countries that doesn't use the SI? I don't know of anyone that has a problem using m, cm or mm in different circunstances

Symbiote 11y ago

Me neither. I remember one of the educational toys my school had, which I played with when I was 5 or 6. We called it "tens, hundreds, units" [1]. There were many 1×1×1cm "units", 10×1×1 "tens", 10×10×1 "hundreds" and a 10×10×10 "thousand". You could fill the hundreds and thousand with water, the thousand obviously being 1L. The British National Curriculum [2] says children - In year 1 (age 5-6) should be able to count centimetres - In year 2, recognise place value, choose appropriate units (cm/m, g/kg, °C etc) and use measuring tools for these - In year 3, to add milli- to that, - In year 4, convert between centimetres and metres, and other units (time and £ and pence) - In year 5, to convert between milli-, centi-, base, and kilo- measures. Calculate square areas in cm² and m² - In year 6, volumes in m³ etc, and converting everything, to three decimal places. (This hasn't changed since the 1960s or something, so it's a shame the country won't get rid of road signs with miles and yards on.) [1] http://www.tts-group.co.uk/shops/tts/Products/PD1723354/Base-Ten-Class-Set/ http://www.tts-group.co.uk/shops/tts/Products/PD1723354/Base... [2] https://www.gov.uk/government/publications/national-curriculum-in-england-mathematics-programmes-of-study/national-curriculum-in-england-mathematics-programmes-of-study https://www.gov.uk/government/publications/national-curricul...

DanBC 11y ago
Some people know those as cuisenaire rods. http://www.amazon.co.uk/gp/aw/d/B00074U7SO/ http://www.amazon.co.uk/gp/aw/d/B00074U7SO/ https://en.wikipedia.org/wiki/Cuisenaire_rods https://en.wikipedia.org/wiki/Cuisenaire_rods They're brilliant, but go careful with some of the work books that are available. ("Blue + red = ?" cause confusion.)

marcosdumay 11y ago

Agreed. I simply can not understand how one can be faster with a millimeter-only caliper than with one marked in centimeters and millimeters. He is right that engineering does not use centimeters. But that's for clarity of communication, not for individual efficiency.