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학생 지침
Click on the 
Match the compatible numbers by dragging the correct compatible to the corner of the triangle.
Complete the following activity. When you are finished, click the green 
to send to your teacher.
선생님 메모 (학생들에게는 보이지 않음)
This activity increases in difficulty with each page. Students are asked to demonstrate their own compatible numbers on the final page.
