Teachers, save “Christmas Tree Addition (missing addends)” to assign it to your class.

Santa's elf needs your help decorating! He's been asked to decorate each Christmas tree with 10 snowflakes. Help him decide how many more snowflakes each tree needs. To solve the equation click to move and add snowflakes to the ten frame. How many more did you need? or to record your answer in the green box. Help the elf by adding the needed snowflakes to the tree. Use the to explain your thinking on each slide. to turn in your assignment.