Hopefully you have all seen your child's math duotang come home this week with an introduction to our new unit. We have started looking at patterns in the hundred's chart and trying to explain the patterns in words. We have also explored the idea that numbers are made up of groups of tens and groups of ones (groups of hundreds are coming soon!).
It was amazing to see the patterns the students came up with on their own. I always expect the patterns of counting by 2's or all of the numbers have 0's in them, but this group surprised me and found some things I hadn't thought of. Here are a few examples of the surprises I had!
The number in the ones and tens column is the same.
The numbers in the ones and tens column count up by ones as you move in a diagonal.
If you add the ones and tens digits together they each equal 4 (in the first diagonal).
If you add the ones and tens digits together (except the 40) they each equal 13 (in the second diagonal).
We learned a new game called Base 10 Battle. In the game player one rolls
2 dice (one dice for the number of ones and one dice for the number of groups of tens)
and player 2 builds the number using the blocks. The tall blocks represent
groups of tens and the individual blocks are one each. Player 2 states the number
that was built and says the number's base 10 name.
'I have the number thirty one. It's base ten name is three tens and one one.'
'We have twenty three. Two tens and three ones.'
'We have sixty one. Six tens and one one.'
We took our game on the road one day this week. Who knows how many
more nice days like this there will be. I wanted the kids to see that
math is everywhere and we can play and practice wherever we are.
We used long woodchips or sticks to be the groups of ten and small
rocks to be the individual ones. Ask your child to teach you the game.
As time goes on we will be rolling three dice. The third dice will be
groups of one hundreds. I wonder what they will think of to represent
the groups of one hundred...
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