5个9之间加什么运算符号等于20可以带括号 在5个9之间加上合适的运算符号及括号=17 18 19 20...
5\u4e2a9\u4e4b\u95f4\u52a0\u4e0a\u9002\u5f53\u7684\u8fd0\u7b97\u7b26\u53f7(\u52a0\u51cf\u4e58\u9664)\u548c\u62ec\u53f7,\u4f7f\u5b83\u4eec\u7684\u8fd0\u7b97\u7ed3\u679c\u7b49\u4e8e20\u3010\uff089/9)+\uff089/9\uff09\u3011*9\u5c31\u53ef\u4ee5\u4e86
9 + 9 - 9 \u00f7\uff08\u221a9 \u00d7 \u221a9\uff09= 17
9 - 9 + \u221a9 + \u221a9 + \u221a9 = 18
9 \u00f7 9 + \u221a9 + \u221a9 + \u221a9 = 19
9 + 9 + (\u221a9 + \u221a9) \u00f7 \u221a9 = 20
(9+9)÷9+9+9=20
9 + 9 + (√9 + √9) ÷ √9 = 20
9 + 9 - 9 ÷(√9 × √9)= 17
(9 × 9 - 9) ÷ 9 + 9 = 17
9 - 9 + √9 + √9 + √9 = 18
(99 ÷ 9 - 9) × 9 = 18
(9 × 9 + 9) ÷ 9 + 9 = 19
9 ÷ 9 + √9 + √9 + √9 = 19
(9+9)➗9+9+9=20
绛旓細锛9+9锛壝9x锛9梅9锛=18梅9x1 =2
绛旓細9 梅 9 + 鈭9 + 鈭9 + 鈭9 = 19
绛旓細瑙o細9+9+锛9+9锛壝9=20
绛旓細(99+9)梅9+9=21 (99+99)梅9=22 甯屾湜鑳藉府鍒颁綘
绛旓細(99+9)梅9+9=21 (99+99)梅9=22 浣犺鐨勬槸杩欎釜涔?
绛旓細(99+9)梅9+9=21 (99+99)梅9=22
绛旓細妤间笂鐨勭瓟妗堝緢宸己浜烘剰锛佸钩鏂归噷闈㈠寘鍚2杩欎釜鏁板瓧锛佹ゼ涓婚鐩篃涓嶆槑纭紒閫氬父姝ょ被闂閮介檺瀹氬湪鍥涘垯娣峰悎杩愮畻銆9梅[(9+9+9)梅9]=3
绛旓細9-9梅9-9梅9 =9-1-1 =7
绛旓細銆愶紙9/9)+锛9/9锛夈*9灏卞彲浠ヤ簡
绛旓細9+9+9-鈭9-鈭9=21 ;9+9+鈭9+9梅9=22;9脳8脳7脳6梅3-5-4+1=1000锛涳紙9+1锛壝楋紙8+2锛壝楋紙6+4锛壝楋紙5-3锛-7=1993锛涳紙9+1锛壝楋紙7+3锛壝2脳5脳8梅4-6=1994