¤p¤G¥Ò¯Z³¯¸R«H ¤@ ¿ï¾ÜÃD 21.ªá¶é¸Ì¦³47°¦½¹½º¡A¸¨«¤F15°¦¡A¤S«D¨Ó¤F19°¦¡Cªá¶é¸Ì¦@¦³´X°¦½¹½º¡H ¹F¡G47-15+19 = 51 §Ì2ӿﶵ 22. 55¬Oþ¤TӼƥ[°_¨Ó¡H ¹F¡G18+17+20 = 55 §Ì1ӿﶵ 23. 17+¬A©·=61¬A©·¤¤À³¸Ó¶ñ¤J¤°»ò¼Æ¡H ¹F¡G61-17 = 44 §Ì3ӿﶵ 24. ¤p¶³¶R¤F1°¦15¤¸ªº¹]µ§¡B¤@¤ä23¤¸ªº¤ô±mµ§©M¤@§â12¤¸ªº¤Ø¡A¤@¦@ªá¤F¦h¤Ö¤¸¡H ¹F¡G15+23+12 = 50 §Ì1ӿﶵ 25. ±Ð«Çùئ³19Ó¨k¦P¾Ç¡B26Ó¤k¦P¾Ç¡B32¦ì¦Ñ®v¡C±Ð«Ç¸Ì¤@¦@¦³¦h¤Ö¤H¡H ¹F¡G19+26+32 = 77 §Ì1ӿﶵ 26. ¶ý¶ý¦b³t¹©±¶R¤F38Áû¬µÁ¦²y¡A¤pµØ¦Y¤F13¬ì¡A¤pÀ¦¦Y¤F12¬ì¡AÁٳѤU´XÁû¡H ¹F¡G38-13-12 = 13 §Ì1ӿﶵ 27. ªá¶é¸Ì¶}¤F27¦·¬õª´ºÀ©M16¦·Äõª´ºÀ¡C©n©nºK¤F12¸ú¡Aªá¶é¸ÌÁٳѤU´X¦·ª´ºÀªá¡H ¹F¡G27+16-12 = 31 §Ì1ӿﶵ 28. ªá¶é¸Ì¦³Ó23°¦±K«Ê¡B12°¦½¹½º¡B17°¦¿]ÂΡCªá¶é¸Ì¤@¦@¦³¦h¤Ö°¦©øÂÎ ¹F¡G23+12+17 = 52 §Ì2ӿﶵ 29. ¤pªá¶¯ªº¬Qº¦³15Ó½L¤l¡A¥k¤â¦³16Ó½L¤l¡Aµ²ªG±¼¤F4Ó¦b¦a¤W¡C ¤pªá¶¯ªº¤â¤WÁٳѤU´XÓ½L¤l¡H ¹F¡G15+16-4 = 27 §Ì1ӿﶵ 30. ¾ð¤W즳47¤ù¸¤l¡A±È±¼¤F16ÄF¡A¤S±¼¤F25ÄF¡A¾ð¤WÁٳѴX¤ù¾ð¸¡H ¹F¡G47-16-25 = 6 §Ì4ӿﶵ |