INVESTIGATING 2 DIGIT NUMBERS

We have been investigating two digit numbers.
Our investigations have lead us to explore not just how many TENS and ONES make up a particular number but also how we can make that number in other ways by regrouping the TENS and ONES.


Here's a video we made that shows how you can regroup 51.

Place Value with 51 from 2M Gems on Vimeo.

Have you explored the regrouping of two digit numbers?
Which numbers did you explore?
What did you discover?

IT'S DAY 60 ALREADY!

It's hard to believe that it's 10 days since Zero the Hero's last visit and that it's now DAY 60!

We are working with big numbers now, so Zero gave us 'numeral expanders' to help us understand 'place value'.

We rolled special 'tens' and 'ones' dice
and used blocks or paddlepop stickes to represent what we had rolled.

Then we checked how many bundles of ten and loose ones we had and recorded it on our numeral expander.

We could then fold the numeral expander in to see the 2 digit number we had made.

With a numeral expander, we can easily check the value of each digit.

Here's Jarvis explaining the number 53.

Want to play some on-line place value games?

Try RAINFOREST MATHS, Level B, Place Value and SHARK POOL

DAY 20 FUN

It's Day 20 of school-

and that means....

ZERO the HERO came to visit!

He brought with him a BIG container of lollies - lollies that could be threaded to make bracelets!



First we had to count out 20 lollies using Base 10 boards.
Then we checked we had 20 by counting in tens.

The Base 10 boards make it easy to see that 20 is 'two' groups of 10.

Then came the tricky part - the threading!Again we used the Base 10 boards to keep track of how many we had threaded and how many we still had to go.


Before long we each had one VERY yummy bracelet!

THANKYOU ZERO FOR OUR DAY 20 TREAT!We wonder what fun Day 30 will bring?

Now is that BEFORE or AFTER Easter?

ZERO THE HERO ARRIVES!

Today ZERO THE HERO

came to our

class

room.

WHY?

Because it was DAY...

ZERO THE HERO came to help us understand the important role 'zero' has in a number, to help us count in tens and learn about place value. He is going to visit us every '10' days until we reach the '100th' day of school.
Then we will have a big celebration like our friends in Canada.


Because it was 'ZERO's first visit, we watched this, his favourite video.



Each time 'ZERO' visits, we'll have a special activity to do.


Today we made threads of 10, sticks of 10 and bundles of 10.

ZERO THE HERO left us 10 pencils for our spare box.

We can't wait until 'ZERO' visits us again in another 10 days.