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「數學之美」 8 個算術遊戲

數學之美. 「數學之美」 8 個算術遊戲. Wonderful World. 數字黑洞 任選四位數 8080 按大排到小減去按小排到大 8800 - 008 8 = 8712 87 12 - 1278 = 7443 7443 - 3447 = 3996 9963 - 3699 = 6264 6264 - 2466 = 4176 7614 - 1467 = 6174 7641 - 1467 = 6174. 任選四位數 7523 按大排到小減去按小排到大 7532 - 2357 = 5175 755 1 - 1557 = 5994

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「數學之美」 8 個算術遊戲

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  1. 數學之美 「數學之美」8個算術遊戲 Wonderful World

  2. 數字黑洞 任選四位數 8080 按大排到小減去按小排到大 8800-0088 =87128712-1278 =7443 7443-3447= 39969963-3699 = 62646264- 2466 = 4176 7614- 1467 = 61747641-1467 = 6174

  3. 任選四位數 7523 按大排到小減去按小排到大 7532-2357 =51757551-1557 =5994 9954-4599= 53555553-3555 = 19989981- 1899 = 8082 8820- 0288 =85328532-2358 = 6174 7641-1467 = 6174

  4. 特殊乘法的速算 47 和 43 的十位數相同個位數之和為 10 4x(4+1)=20 7x3=21 47x43=2021 同理61x69=4209 86x84=7224 35x35=1225 備註: (10x+y)(10x+(10-y))=100x(x+1)+y(y+1)

  5. 翻倍再翻倍 123456789 x 2 = 246913578246913578 x 2 =493827156 493827156 x 2 =98765312 98765312 x 2 =1975308624 1975308624 x 2 =3950617248 3950617248x 2 =7901234496 出狀況了，是不是？

  6. 唯一的解 數字 381654729 3 能被 1 整除 38 能被 2 整除 381 能被 3 整除 3816 能被 4 整除 …………………. 381654729 能被 9 整除 此數是唯一由1,2,…,9組成的數 共有362880個數中 唯一滿足以上條件的解

  7. 幻方之幻 一個3階幻方是每行每列 及對角線的3個數字和為15

  8. 自然形成之幻方

  9. 一個小魔術 前兩格填入1~10的數字,以後依序相加二個數字後,為下一個數字. 7+3=10 3+10=13 10+13=23 13+23=36 23+36=59 36+59=95 59+95=154 95+154=249 249x1.618=402.882≈403

  10. 288x1.618=465.984≈466 309x1.618=499.962≈500 123x1.618=199.014≈199

  11. 3個神奇的分數 小數點後每二位為 0204081632

  12. 小數點後每二位為Fibonacci 數列 01010203050813213455 小數點後每二位為 01020304050607080910111213…2021

  13.  Have a great day… and that God bless you!

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