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This is a fun way to work on finding the missing addends. Print the 10 mats and laminate. Provide the children with pink playdough so they can create snow blocks. Students will look at the equation, the first number of snow blocks is already on the mat. (blue snow blocks) Then they will build up to the sum using their pink playdough snow blocks. The pink snow blocks is the missing addend. After they have their answer the children will write the equation on a recording sheet. Addition equations used in this unit are 1 - 10.