How to Make Groups of 10

LI Add single digit numbers making groups of 10

To make Groups of 10

Today I have being making 10 using groups of 4 different numbers. So we would have to choose 4 numbers I choose 7+3+9+2 so I would put the 3 with the 7 as they are number buddies and it equals 10.  Then I would put on from the 2 with the 9, as 9 and 1 are number buddies, and this would equal 10. So then I have 10+10+1 and it equal  21.