*Addition Facts 11-20*
This game addresses the skills of adding 11-20 and recognizing the commutative property of addition. To set it up, distribute the fish bowl cards around the room. Then, give each child some fact cards. Either have them use mental math to solve the problems as they search for the correct fish bowl, or have them write the answer on the card with a dry erase marker first. When the cards have all been sorted, check each one with the group. Discuss which cards have been placed correctly and why some numbers have more cards than others (the number 20 has the most facts, for example.) Have the students pair up the fact cards that use the associative property. As a follow up, two cut and paste worksheets have been included.
For facts 1-10, see the companion set here:
Addition Facts to 10
See also Subtraction Facts to 10:
Subtraction Facts to 10
And Subtraction Facts 11-20 can be found here:
Subtraction Facts 11-20