Friday, 23 May 2014

Year 4 Week 3 -Number through time

This week we have explored how long a minute is by counting how many skips we can complete in this time.  We have also tossed a coin for 3 minutes to see how many times it lands on $ or Kiwi side.  We used tally marks to keep a count of our tosses.  We found that counting in 5's makes it easier and quicker to count how many.



We are exploring the clock.  60 minutes make 1 hour.  We discovered that that the minutes are grouped into even groups of 5.  We are making a bead clock to work out how many groups of 5 make 60.  Wini thinks we will need 12 groups of 5.  I wonder if she is right?
We investigated how the clock face is divided (equal shares) into 2 equal parts...half past
 4 equal parts....quarters...quarter past and quarter to...

 Half of 12 is 6 and double 6 is 12. 6+6 = 12 Half of 60 is 30 and double 30 is 60. 30+30=60
So much nunber is needed to tell the time!
 Here are our 4 equal parts - quarters.  Put them together and we will have a whole clock face!
                                                  1/4 +1/4+1/4=1/4=1 whole clock











Sunday, 18 May 2014

Strong Mathematicians use numbers flexibly



Some of the Year 4 students found the anwser of how many dots by grouping  2,4,6 + 1 = 7
7+7=14
Others saw 2 groups of 3 = 6
6+1=7
7+7=14
We are learning to see groups/patterns/doubles to work out how many dots there are altogether...
What do you see?

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