Friday, October 3, 2014

Math: Counting and Place Value

In math, we are learning about counting and place value. 

Last week, we used our understanding of the order of numbers to create 100 chart puzzles. 

First, we filled in a 100 chart. 

Then, we designed the shapes of our pieces and cut them out. 

Once the pieces were cut out, we traded with our friends to solve the puzzles. 

Some puzzles were really tricky! 

We had to know what numbers were 1 less or 1 more, and even 10 less or 10 more to find the right spots for our pieces!

We are also learning about skip counting. 

Skip counting is counting by numbers other than one. 

In grade two, many of us are learning to skip count by 3s, 4s, and 6s!

Last week, we created skip counting chains. 

First, we cut strips of paper in different colours and then practiced our skip counting by writing numbers in order. 

Some of us even counted to numbers over 100! 

We just couldn't stop!

Once the strips were ready, we connected them to create chains. 

Look how cool they look on this guy!

We even put them up in different places to decorate our classroom. 

This way, we can practice our skip counting whenever we want to!

We also started exploring how to show the same number in different ways. 

Some people chose to show the number using numbers. 

In grade two, we call this "standard form". 

Some people showed it using words. 

This is called "word form", or "written form". 

Other people chose some different ways, like using blocks!

We could connect all the blocks in one line, or...

...make groups of ten! 

We realized that this made it easier for us to count!

Some of use used cups to show our groups...

...and others even used straws to make groups of ten. 

We used our social skills to work together to make this task easier and faster for everyone. 

We then used our new understanding of different ways to represent numbers to create expanding monsters!

The numbers are expanding because they change from standard form to expanded form. 

For example, Eason's number 359 can be expanded to 300 + 50 + 9. 

Look at all those expanding faces!

Well, good bye till next time from our birthday girl, Riana!


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