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1) ¹èÆÃÇÑ ¼ýÀÚ¿Í À̹ø ¶ó¿îµå ÀÏÄ¡
3 ¶ó¿îµå, 2 ¹èÆÃ, 2 ½Â¸®
2 X 20 = 40 Á¡ >>> ¶ó¿îµå ¹«½Ã (¹èÆà ¶Ç´Â ½Â¸®) x 20
(º¸³Ê½º) ½ºÄÃÅ· ½Â¸® ½Ã 30 Á¡
40 + 30 = 70 Á¡ >>> ¶ó¿îµå µæÁ¡¿¡ Ãß°¡ Á¡¼ö
(º¸³Ê½º) ÀÎ¾î ½Â¸® ½Ã 50 Á¡
40 + 50 = 90 Á¡ >>> ¶ó¿îµå µæÁ¡¿¡ Ãß°¡ Á¡¼ö
2) ¹èÆÃÇÑ ¼ýÀÚ¿Í À̹ø ¶ó¿îµå ºÒÀÏÄ¡
3 ¶ó¿îµå 2 ¹èÆÃ, 1 ½Â¸®
(2 – 1) X 10 = 10 Á¡ °¨Á¡ >>> ¶ó¿îµå ¹«½Ã (¹èÆà - ½Â¸®) X 10 ¶Ç´Â (½Â¸® - ¹èÆÃ) X 10
3 ¶ó¿îµå 1 ¹èÆÃ, 2 ½Â¸®
(2 – 1) X 10 = 10 Á¡ °¨Á¡ >>> ¶ó¿îµå ¹«½Ã (¹èÆà - ½Â¸®) X 10 ¶Ç´Â (½Â¸® - ¹èÆÃ) X 10
3) ¹èÆÃÇÑ ¼ýÀÚ°¡ 0, À̹ø ¶ó¿îµå 0ȸ ½Â¸®
3 ¶ó¿îµå, 0 ¹èÆÃ, 0 ½Â¸®
3 X 10 = 30 Á¡
4) ¹èÆÃÇÑ ¼ýÀÚ°¡ 0, À̹ø ¶ó¿îµå ½Â¸®
3 ¶ó¿îµå, 0 ¹èÆÃ, 2 ½Â¸®
3 X 10 = 30 Á¡ °¨Á¡ >>> ¹èÆÃ, ½Â¸® ¹«½Ã (¶ó¿îµå X 10 ) °¨Á¡
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