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1. ³ª¹« Á£°¡¶ô¿¡ ±æ°Ô ÂõÀº »öÁ¾À̸¦ ³¡¿¡ ºÙ¿©ÁÝ´Ï´Ù.
2.¾ÆÀÌ¿¡°Ô ¼± ¹ÛÀ¸·Î ³ª¿ÀÁö ¾Ê°Ô °Å¸® Á¶Àý Çϸç Å«Åë ´õ ÀÛÀºÅë¿¡ ´øÁö±â ³îÀ̸¦ ÇÕ´Ï´Ù.
3. »çÁø¿¡´Â ¾øÁö¸¸. ÁÖ»çÀ§¸¦ ´øÁ® ³ª¿À´Â °º¼ö ¸¸Å Åë¿¡ ³Ö¾î º¸±â.. ¼ýÀÚ °øºÎµµ Çϰí. ¸î°³ ´øÁ®¼
¸î °³°¡ µé¾î°¬´ÂÁö »¬¼À °øºÎµµ ÇÕ´Ï´Ù.
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Let's play Tuho game. ÅõÈ£ ³îÀ̸¦ ÇØº¸ÀÚ.
Stand on the line and throw the sticsk into the jar. ¼±¿¡ ¼¼ Åë ¼ÓÀ¸·Î ¸·´ë±â¸¦ ´øÁ® º¸ÀÚ.
I will give you 10 stiks. 10°³ÀÇ ¸·´ë±â¸¦ ÁÙ²².
Let's throw the die. ÁÖ»çÀ§¸¦ ´øÁ®º¸ÀÚ.
Let's throw 4 sticks into the jar. (ÁÖ»çÀ§ÀÇ ¼ýÀÚ)4°³ÀÇ ¸·´ë±â¸¦ Åë¼Ó¿¡ ³Ö¾îº¸ÀÚ.
How many sticks are in the jar? Two! Åë¼Ó¿¡ ½ºÆ½Àº ¸î°³ Àϱî?
How many sticks are left on the floor? Two. ¶¥¿¡ ¶³¾îÁø ½ºÆ½Àº ¸î°³?
There were four sticks at first. And two of them are left on the floor.
So how many sticks are in the jar?
4°³ÀÇ ½ºÆ½ Áß¿¡ ¶¥¿¡ ¶³¾îÁø°Ç 2°³ ÀÔ´Ï´Ù. Åë¼Ó¿¡ ÀÖ´Â ³²¾ÆÀÖ´Â ½ºÆ½ÀÇ ¼ö´Â?
Is it addition or subtraction? µ¡¼ÀÀÌ´Ï »¬¼ÀÀÌ´Ï?
We could say, 4 minus 2 is 2. À̰ÍÀ» »¬¼À½ÄÀ¸·Î ¾²¸é, 4-2=1.