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Instructions for Pupils
Click 
.
Use 
to drag the snowballs and hit the problem that it is the answer for.
Click 
to hand in your work.
Teacher Notes (not visible to pupils)
CCSS.MATH.CONTENT.2.NBT.B.5: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
