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#1
05-13-2006, 12:01 PM
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【轉帖】祝 大 家 都 發！發！發！
"數學是科學之母 "
3 x 37 = 111 6 x 37 = 222 9 x 37 = 333 12 x 37 = 444 15 x 37 = 555 18 x 37 = 666 21 x 37 = 777 24 x 37 = 888 27 x 37 = 999 Nice one: 111,111,111 x 111,111,111 =12,345,678,987,654,321 Trapeze: 1 x 9 + 2 = 11 12 x 9 + 3 = 111 123 x 9 + 4 = 1111 1234 x 9 + 5 = 11111 12345 x 9 + 6 = 111111 123456 x 9 + 7 = 1111111 1234567 x 9 + 8 = 11111111 12345678 x 9 + 9 = 111111111 another Trapeze: 1 x 8 + 1 = 9 12 x 8 + 2 = 98 123 x 8 + 3 = 987 1234 x 8 + 4 = 9876 12345 x 8 + 5 = 98765 123456 x 8 + 6 = 987654 1234567 x 8 + 7 = 9876543 12345678 x 8 + 8 = 98765432 123456789 x 8 + 9 = 987654321 and another one: 0 x 9 + 8 = 8 9 x 9 + 7 = 88 98 x 9 + 6 = 888 987 x 9 + 5 = 8888 9876 x 9 + 4 = 88888 98765 x 9 + 3 = 888888 987654 x 9 + 2 = 8888888 9876543 x 9 + 1 = 88888888 98765432 x 9 + 0 = 888888888 987654321 x 9 - 1 = 8888888888 9876543210 x 9 - 2 = 88888888888 祝 大 家 都 發！發！發！ 此篇文章於 05-13-2006 12:06 PM 被 tsui 編輯。 
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#2
05-13-2006, 02:19 PM
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這對學心算的很管用吧!
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You can be brilliant, but if you can't express it in simple ways, your brilliance isn't worth much.
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