Last week, students were discovering the difference between a decametre and decimetre. Together we found that a 'deci'metre equals 1/10th of a meter (or 10 cm's) and on the opposite end a 'deca'metre equals 10 metres. Students found measurements in the school that equaled 10 metres or more and showed this measurement in Dam, m, cm, and mm. This should be a review for most grade 7's and new for grade 6's. Converting measurements is definitely a challenging concept to attain but proves to be useful in daily life. Please feel free to encourage and support this concept at home. Thanks for reading.
As we work on converting measurements, students are encouraged to convert to units they know first.
By finding these friendly units, they can be reminded how to convert to a smaller or bigger unit.
For example,
if I asked students how many centimetres are in 11 decametre, they must first convert to what they know.
1 decametres is equal to 10 metres so...
11 decameters is equal to = 10 metres X 11 = 110.
We know 11 decametres = 110 metres. Then we can convert to cm's.
1 m = 100 cm's (the difference is 100 and we multiply 100)
Therefore 11 Dam's = 11 000 cm's
Below is a Khan Academy video to help review converting from km's to m's to cm's.
https://www.youtube.com/watch?v=9iulv2QvKwo
Students can quiz themselves and check answers with the Dam to cm converter below:
http://www.conversion-metric.org/length/decameter-to-centimeter
Distance conversions students should know by the end of grade 6/7 - millimetre, centimetre, decimetre,
metre, decametre, hectometre, and kilometre
I will be giving students 6-8 questions on Monday as a check in and holding math help first recess day 3 and 5. Thanks :)
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