❶ 8/15镄勮＄畻缁撴灉鏄澶氩皯锛
涓涓闀挎柟浣挞奔缂搁暱4/5绫筹纴瀹1/2绫筹纴閲岄溃鐩涙湁8/15绔嬫柟绫崇殑姘达纴姘存繁4/3绫炽
8/15梅(4/5脳1/2)
=8/15梅2/5
=8/15脳5/2
=4/3
闄ゆ硶杩愮畻镐ц川
琚闄ゆ暟镓╁ぇ锛堢缉灏忥级n鍊嶏纴闄ゆ暟涓嶅彉锛屽晢涔熺浉搴旂殑镓╁ぇ锛堢缉灏忥级n鍊嶃
闄ゆ暟镓╁ぇ锛堢缉灏忥级n鍊嶏纴琚闄ゆ暟涓嶅彉锛屽晢鐩稿簲镄勭缉灏忥纸镓╁ぇ锛塶鍊嶃
琚闄ゆ暟杩炵画闄や互涓や釜闄ゆ暟锛岀瓑浜庨櫎浠ヨ繖涓や釜闄ゆ暟涔嬬Н銆傛湁镞跺彲浠ユ牴鎹闄ゆ硶镄勬ц川𨱒ヨ繘琛岀亩渚胯繍绠椼傚傦细300梅25梅4=300梅锛25脳4锛夐櫎浠ヤ竴涓鏁板氨=杩欎釜鏁扮殑鍊掓暟
❷ 5脳8/15鐢ㄧ亩渚跨畻娉曟庝箞绠楋纻
5脳8/15=8脳5/15=8脳1/3=8/3銆傚皢绯绘暟8鍜屽垎瀛5杩涜屼簰鎹锛岀粨鏋滀笉鍙桡纴鍒嗘暟5/15涓锛5鍜15鍏锋湁链澶у叕锲犳暟5锛屾墍浠ュ彲浠ョ害鍒嗕负1/3锛屾渶钖庤＄畻寰楀埌缁撴灉涓8/3銆