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color the numbers with 9 ones.
color the numbers with 7 tens
color the numbers with 1 one.
 
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7 tens ´Â  ½ÊÀÚ¸®°¡ 7ÀÌ°í
1 one´Â ¸ðµç ¼ö¿¡ 1ÀÌ ÀÖÀ¸¸é »öÄ¥Ç϶ó´Â°ÍÀÌ ¸Â³ª¿ä?