This beautiful butterfly needs your first grader's help! She'll need to fill in this KenKen® grid using her addition and subtraction facts and some logical thinking skills. Teachers around the world are praising this little puzzle's ability to improve students' mathematical reasoning skills, and you'll soon find out just why that is. Good luck!

How to Play:

Using the digits 1-3 in this 3x3 puzzle, fill the small squares with digits so as not to repeat a digit in any row or column, and so that the digits within each heavily outlined area will equal that area’s corner number when combined using the given operation. For more information visit www.kenken.com.

 

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