More Composing and Decomposing

As I stated last in my last composing and decomposing post. -----

What does it mean to compose and decompose numbers?   If you compose a number you out it together.  If you decompose a number you break it apart. Our  math standards state we can compose and decompose numbers 11-19.  Students must see one of these numbers as 10 and some more.  For example, the number 14 is 10 and 4 more. We would write that number sentence as 10+4=14. 

This week we are using teen numbers and breaking the into 2 tens frames, place value, a number sentence, and words.  

This is reinforced in math stations 😊

This is such a hard skill to learn but once the students have it, they seem not to struggle as much with number sense.

MATH STATIONS!

I had to lower my number of stations this week. With everything going on 10 was a lot to get in. I went down to 8 and we will only be doing them Monday - Thursday.
 

Station 1  - Comparing numbers 

Using 10 sided dice the students roll and the use the moveable rectangles to create a greater than, less than, or equal to sign. 

 Station 2 -Building numbers 

Using two - three 10 sided dice with dots the student determines how many dots there are all of ether and then builds the number using rods and singles. 

 Station 3 - representing teen numbers 

 http://www.teacherspayteachers.com/Product/Decomposing-Numbers-11-20-964994

Station 4 

iPads - this makes it so easy to differentiate for each child. 

 Station 5 - making 10

http://www.teacherspayteachers.com/Product/Making-10-971911

 Station 6 - Decomposing numbers

 

http://www.teacherspayteachers.com/Product/Decomposing-Teen-Numbers-971926

 Station 7 

One more, one less 

 Station 8. 

One more one less using the number line 

Composing and decomposing numbers

What does it mean to compose and decompose numbers?   If you compose a number you out it together.  If you decompose a number you break it apart. Our  math standards state we can compose and decompose numbers 11-19.  Students must see one of these numbers as 10 and some more.  For example, the number 14 is 10 and 4 more. We would write that number sentence as 10+4=14. 

This week I am giving the students a 9 domino (has numbers 0-9 on each side). They must reproduce the dice on their paper and count to decide how many.  When they come up with the answer and wrote it on paper correctly (14 is written with a 1 and a 4 (14) not a 4 and a 1 (41) ) then they have composed the number.  They then have to represent the number in place value (1 rod and 4 ones) and wrote a number sentence to match.