25x4x10+250x4=?
123456789x900=?
1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99=?
222222222222222x88=?
(25+29)x85+(39+39)x100=?
25x4=..........................
2007-01-27 5:07 am
回答 (7)
2007-01-27 10:59 pm
✔ 最佳答案
1.20002.111111110100
3.4900
4.19555555555555536
5.439800
2007-01-28 2:51 am
25x4x10+250x4
=100x10+1000
=1000+1000
=2000
123456789*900
=123456789*9*100
=1111111101*100
=111111110100
1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=(1+99)*99/2
=100*99/2
=50*99
=4950
2222222222222222*88
=2*111111111111111*8*11
=2*8*12222222222222221
=2444444444444442*8
=195555555555555536
(25+29)*85+(39+39)*100
=54*85+78*100
=4590+7800
=12390
=100x10+1000
=1000+1000
=2000
123456789*900
=123456789*9*100
=1111111101*100
=111111110100
1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=(1+99)*99/2
=100*99/2
=50*99
=4950
2222222222222222*88
=2*111111111111111*8*11
=2*8*12222222222222221
=2444444444444442*8
=195555555555555536
(25+29)*85+(39+39)*100
=54*85+78*100
=4590+7800
=12390
參考: This is all culculate by myself expect q3
2007-01-27 7:24 am
25x4x10+250x4=2000
123456789x900=111 111 110 100
1+3+5+7+9+11+13+15+17+19+......+99=2500
222222222222222x88=19 555 555 555 555 536
(25+29)x85+(39+39)x100=12390
123456789x900=111 111 110 100
1+3+5+7+9+11+13+15+17+19+......+99=2500
222222222222222x88=19 555 555 555 555 536
(25+29)x85+(39+39)x100=12390
2007-01-27 5:36 am
1)25x4x10+250x4
=100x10+250x4
=1000+250x4
=1000+1000
=2000
2)123456789
=11111110100
3)1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=4+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
2007-01-26 21:38:27 補充：
3)=9 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99=16 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
=100x10+250x4
=1000+250x4
=1000+1000
=2000
2)123456789
=11111110100
3)1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=4+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
2007-01-26 21:38:27 補充：
3)=9 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99=16 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
2007-01-27 5:35 am
25x4x10+250x4
=1000+1000
=2000
123456789x900
=(123456789x9)x100
=1111111101x100
=111111110100
1+3+5+...+99
=(1+99)+(3+97)+(5+95)+....+(49+51)
=100+100+100+...100--------------------25個100
=2500
222222222222222x88
=111111111111x11x16
=1222222222221x16
=19555555555536
(25+29)x85+(39+39)x100
=54x85+78x100
=4x5x17x9+7800
=20x153+7800
=3060+7800
=10860
=1000+1000
=2000
123456789x900
=(123456789x9)x100
=1111111101x100
=111111110100
1+3+5+...+99
=(1+99)+(3+97)+(5+95)+....+(49+51)
=100+100+100+...100--------------------25個100
=2500
222222222222222x88
=111111111111x11x16
=1222222222221x16
=19555555555536
(25+29)x85+(39+39)x100
=54x85+78x100
=4x5x17x9+7800
=20x153+7800
=3060+7800
=10860
2007-01-27 5:34 am
25x4x10+250x4=250x4+250x4=(250+250)x4=500x4=2000
123456789x900=111111110100
1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=(1+99)x(1+99)x1/2x1/2
=100x100x0.5x0.5
=2500
222222222222222x88=19555555555555536
(25+29)x85+(39+39)x100=54x85+78x100=4590+7800=12390
Must be correct!!!
123456789x900=111111110100
1+3+5+7+9+11+13+15+17+19+21+23+25+27+29+31+33+35+37+39+41+43+45+47+49+51+53+55+57+59+61+63+65+67+69+71+73+75+77+79+81+83+85+87+89+91+93+95+97+99
=(1+99)x(1+99)x1/2x1/2
=100x100x0.5x0.5
=2500
222222222222222x88=19555555555555536
(25+29)x85+(39+39)x100=54x85+78x100=4590+7800=12390
Must be correct!!!
2007-01-27 5:28 am
1)2000
2)111111110100
3)4900
4)19555555555555536
5)439800
由於小弟可能會算錯,如計算錯誤,請見諒!!!!0_0
2)111111110100
3)4900
4)19555555555555536
5)439800
由於小弟可能會算錯,如計算錯誤,請見諒!!!!0_0
參考: me
收錄日期: 2021-04-12 23:25:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070126000051KK03505