Decomposing Numbers



We have been working hard on decomposing numbers!  We have learned that decompose means to separate into parts and have enjoyed finding different ways to separate our numbers into parts.  We have discovered that there are more then one way to break apart most of the numbers through 10. 

 

Guess my way was a favorite game during game time!  With a partner we decided on a number.  Partner 1 broke apart the number showed it on their part/part/whole model.  Partner 2 tried to guess the way that their partner made the number.  They would ask is it two and two?  And partner 1 would respond with "Yes! That's my way to make 4," or "That's a way to make 4, but that's not my way." 

 



We also worked with a partner to show some of the different ways to decompose a number, using different models.  Each pair was challenged to come up with a way to decompose a number and show it using a domino, circles and a number sentence. 

 

Look at our finished charts!  We found all the ways to decompose the numbers 6 through 10!

 

 

Friends of 10!  We spent a few days working on a very special number: 10!  Understanding this number is going to be a very important part of 1st grade as we learn to add and subtract larger numbers. 

 

This week, we played 10 Bond GO FISH!  To play you need two sets of number cards 1 through 9.  Each person gets 4 cards, and the rest go in the fish pond.  The goal is find the pairs of number that make 10.  If you do not have a pair that makes 10, you need to ask another player for a card to complete one of your pairs.  If that player doesn't have your requested card, you draw one from the fish pond. 

 

 

Math Journals were an exciting time this week as we learned how to draw ten frames and were challenged to find all the different ways we could show ten if we had some red and yellow chips.  We are still working on making sure our ten frames have 10 squares, but overall I was very impressed with how eager each child was to attempt to draw their own 10 frames and how well most of them turned out! 

 

We will begin putting these concepts together as we learn different addition strategies such as making a ten!  Keep up the great work Mathematicians! :)