[閒聊] 12*15大家都怎麼算
如果沒計算機
我會這樣看
12*15=12*(12+3)=144+12*3=180
而且我寫直式的習慣是從前往後算
12
*15
__________
120
60
___________
180
前幾天偶然發現的 小時候也是從後往前算 不知道何時改的
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06/01 12:48, , 1F
06/01 12:48, 1F
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06/01 12:48, , 2F
06/01 12:48, 2F
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06/01 12:49, , 3F
06/01 12:49, 3F
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06/01 12:49, , 4F
06/01 12:49, 4F
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06/01 12:49, , 5F
06/01 12:49, 5F
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06/01 12:49, , 6F
06/01 12:49, 6F
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06/01 12:50, , 7F
06/01 12:50, 7F
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06/01 12:51, , 8F
06/01 12:51, 8F
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06/01 12:51, , 9F
06/01 12:51, 9F
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06/01 12:51, , 10F
06/01 12:51, 10F
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06/01 12:52, , 11F
06/01 12:52, 11F
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06/01 12:52, , 12F
06/01 12:52, 12F
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06/01 12:52, , 13F
06/01 12:52, 13F
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06/01 12:53, , 14F
06/01 12:53, 14F
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06/01 12:54, , 15F
06/01 12:54, 15F
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06/01 12:54, , 16F
06/01 12:54, 16F
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06/01 12:54, , 17F
06/01 12:54, 17F
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06/01 12:55, , 18F
06/01 12:55, 18F
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06/01 12:56, , 19F
06/01 12:56, 19F
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06/01 12:56, , 20F
06/01 12:56, 20F
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06/01 12:56, , 21F
06/01 12:56, 21F
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06/01 12:56, , 22F
06/01 12:56, 22F
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06/01 12:56, , 23F
06/01 12:56, 23F
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06/01 12:57, , 24F
06/01 12:57, 24F
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06/01 12:57, , 25F
06/01 12:57, 25F
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06/01 12:57, , 26F
06/01 12:57, 26F
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06/01 12:58, , 27F
06/01 12:58, 27F
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06/01 12:58, , 28F
06/01 12:58, 28F
推
06/01 13:01, , 29F
06/01 13:01, 29F
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06/01 13:01, , 30F
06/01 13:01, 30F
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06/01 13:02, , 31F
06/01 13:02, 31F
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06/01 13:03, , 32F
06/01 13:03, 32F
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06/01 13:03, , 33F
06/01 13:03, 33F
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06/01 13:04, , 34F
06/01 13:04, 34F
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06/01 13:05, , 35F
06/01 13:05, 35F
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06/01 13:05, , 36F
06/01 13:05, 36F
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06/01 13:06, , 37F
06/01 13:06, 37F
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06/01 13:08, , 38F
06/01 13:08, 38F
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06/01 13:09, , 39F
06/01 13:09, 39F
還有 178 則推文
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06/01 22:23, , 218F
06/01 22:23, 218F
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06/01 22:24, , 219F
06/01 22:24, 219F
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06/01 22:33, , 220F
06/01 22:33, 220F
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06/01 22:36, , 221F
06/01 22:36, 221F
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06/01 22:44, , 222F
06/01 22:44, 222F
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06/01 23:03, , 223F
06/01 23:03, 223F
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06/01 23:07, , 224F
06/01 23:07, 224F
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06/01 23:11, , 225F
06/01 23:11, 225F
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06/01 23:12, , 226F
06/01 23:12, 226F
推
06/01 23:25, , 227F
06/01 23:25, 227F
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06/01 23:49, , 228F
06/01 23:49, 228F
推
06/01 23:49, , 229F
06/01 23:49, 229F
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06/01 23:50, , 230F
06/01 23:50, 230F
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06/02 00:05, , 231F
06/02 00:05, 231F
推
06/02 00:49, , 232F
06/02 00:49, 232F
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06/02 01:17, , 233F
06/02 01:17, 233F
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06/02 01:17, , 234F
06/02 01:17, 234F
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06/02 02:12, , 235F
06/02 02:12, 235F
推
06/02 02:40, , 236F
06/02 02:40, 236F
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06/02 02:55, , 237F
06/02 02:55, 237F
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06/02 03:08, , 238F
06/02 03:08, 238F
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06/02 04:12, , 239F
06/02 04:12, 239F
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06/02 04:27, , 240F
06/02 04:27, 240F
推
06/02 05:22, , 241F
06/02 05:22, 241F
推
06/02 05:34, , 242F
06/02 05:34, 242F
推
06/02 06:54, , 243F
06/02 06:54, 243F
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06/02 07:10, , 244F
06/02 07:10, 244F
推
06/02 08:05, , 245F
06/02 08:05, 245F
→
06/02 09:47, , 246F
06/02 09:47, 246F
推
06/02 10:27, , 247F
06/02 10:27, 247F
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06/02 10:27, , 248F
06/02 10:27, 248F
推
06/02 20:57, , 249F
06/02 20:57, 249F
推
06/02 21:04, , 250F
06/02 21:04, 250F
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06/02 23:53, , 251F
06/02 23:53, 251F
推
06/03 00:31, , 252F
06/03 00:31, 252F
推
06/03 03:26, , 253F
06/03 03:26, 253F
推
06/03 13:57, , 254F
06/03 13:57, 254F
推
06/03 19:37, , 255F
06/03 19:37, 255F
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06/08 23:31, , 256F
06/08 23:31, 256F
推
06/11 23:57, , 257F
06/11 23:57, 257F