Activity Instructions:
1. Say how much each item on the canteen price
list costs and see if they can find any errors. (There
are lollies listed as 0.5 which are actually worth 5c.) Note
that this extract was taken from a real canteen list which
had been distributed to all students at the school and was
probably stuck on 300 home fridges!
2. Perhaps discuss the "similar" situation of
time, e.g. 5 minutes past 3 is 3:05 on a digital clock/watch,
not 3:5. However, while time is similar to decimals
of length 2 (in this respect), please remind students that
time is not a base ten system! When counting in
minutes, the next time after 3:59 is 4:00 but when counting
in hundredths, 3.59 is followed by 3.6.
3. Follow-up: Students collect examples from
daily life where decimal points are used - watching out for
any errors. (Children may also collect examples
of 'decimal-point-like' dots which are not decimals so that
the class has a range of examples
and non-examples.)
|
