Wednesday, September 25, 2013

Day 3 - 25 Sept 2013 Place Value & Fractions

The Grinch from AnimateIt.net

Problem 9: 
Using number 0 to 9, form the greatest addition sum and the smallest sum by not repeating the numbers. 




My group and I used the trial and error method to get both the BIGGEST and smallest number we can form, after adding up.





It was interesting exploring the possibilities of forming the sum. We had fun while trying out.                              


 

Trial & Error Method 

Dr Yeap shared with us that if the children are ready to count by one noun, they will be able to           differentiate blocks of 10s & 1 of 10.

Dr Yeap also shared that it is unwise to get children to use lines to divide the sum. The children should be able to identify which are ones and tens and add accordingly rather to recognize it as numbers without any association.


According to Dr Yeap, the picture on the left is not an appropriate way to teach younger age children to add as the children 
should know that it represent a set. It is two ten 5 ones (twenty five) plus one tens 2 
ones (twelve), hence arriving at the answers of 3 tens 7 ones (37).

It is also better if the sum is written as 25 + 12 = rather than the vertical way of writing them as it is a Procedural Knowledge and some children cannot recall to solve the answer in that form.  


The children can also use Base Ten Blocks in helping them to
understand tens and ones and in addition and subtraction.


The following video, I found it interesting for the children to listen and make connections to the numbers value and the base ten block. 
Have fun Viewing!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Problem 12 Share 3/4 cake equally between 2 person. How much does each gets? The normal way of solving this question for us should be:- 3/4 divide by 2  3/4 x 1/2 = 3/8 3/8 slices of cakes will be shared among 2 person.
However, Dr Yeap did not give us an answer. His explanation was that he did not ask us to change the denominator to do the sum. 
In this case, the above sum could not be solve. 
The point he wants to bring across is: Denominator which is different cannot be put together to discuss and solve. Example was, an apple and an orange. Can you add the two up and says I have 2 appleorange? No we can't.
Points to note when dealing with Fractions:
# Addition & Subtraction only takes place when the noun (denominator)is the same.
Fraction's language alert! 3/4 is read as 3 fourths. Not 3 over 4 or 3 upon 4! We only use 3 in 4 chance or 1 out of 4 chance if we are referring to properties. 
****************************************************************************************** New words I have learnt today 
Acceleration: A new skill concept, a level higher from the current concept.
Enrichment: Remaining at the same concept but scaffold in a different way of learning.
Small Flying Blue Butterfly from AnimateIt.net

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