The Magical 1089

Dear all, rem the book trick I tried with all of you?

The one whereby I wrote something on a piece of paper and asked one of your classmates to keep it...

Well here the trick to it....

One of Einstein's Favorite Puzzles

It is said that Albert Einstein used to take great delight in baffling friends with the puzzle below.

First, write the number 1089 on a piece of paper, fold it, and hand it to a friend for safekeeping. What you wrote down is not to be read until you have completed your amazing mental feat.

Next, ask your friend to write down any three-digit number, emphasizing that the first and last digits must differ by at least two. Close your eyes or turn your back while this is being done. Better still, have someone blindfold you.

After your friend has written down the three-digit number, ask him to reverse it, then subtract the smaller from the larger.Example: 654 - 456 = 198.

Once this is done, tell your friend to reverse the new number
.Example: 198 becomes 891.

Next ask your friend to add the new number and its reverse together.
Example: 198 + 891 = 1089.

If all goes as planned, your friend will be amazed.

The number you wrote down at the start -- 1089 -- will always be the same as the end result of this mathematical trick.

Math Video

Boys,

click http://www.mathplayground.com/wp_2A.html to go to a very cool website that shows video relating to math word problems sum.

Click on an Question to read and try on your own. After your attempt, click on the Answer to watch a video that explain the solution.

So turn on your speakers and enjoy!! :-)

Try this fun game!!

Try this... finding place value and rounding off.

http://www.funbrain.com/tens/

Click on the easy and medium level first, because the hard and super brain level includes decimal which we had not touch on yet. But of course you are welcome to try. :-)

Plus do remember to complete your homework!!

5C- Your blue booklet Whole Number worksheet 2

5D- The selected review 1 questions and problem solving.

Enjoy!! :-)

BODMAS

Remeber the BODMAS RULE!!

B is for Bracket, which you need to solve first.

D is for divison and M is for Multiplication, BOTH forms a set, which needs to be solve before A n S.

Division or Multiplication to solve first, you may ask, well which appear first in the solution, following the left to right rule

A is for addtion and S is for subtraction. Same thing applies here, you solve from Left to Right.

So there you have it your BODMAS rule!!

P/s: for some, remember the incredible family rule :-)

PP/s: You can even try singing the above to a catchy tune!! ;-)

1st interesting Video....

Welcome

Dear 5C and 5D Class, welcome to this delightful little blog.

I will try my best to post interesting videos that are related to math in this blog. (Though I cannot promise it to be daily) Important learning outcome and points will also be posted up.

Please check this blog regularly for any form of updates.

Feel free to upload any useful math concepts or video. BUT please DO NOT upload any inappropriate materials, if you do, be prepare for the consequences!!

P/S: If Miss Loh commits any grammatical errors, please pardon me.