巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)
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巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)巧算:(1-
巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)
巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)
巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)
很好算,将括号去掉,也即等于1+2+3+...+2002-(1/2000+.+1/2002*2002)
等差加等比,算出即可,当然1/2000的2002次方可约等于0
巧算:(1-1/2002)+(2-1/2002*2)+.+(2002-1/2002*2002)
巧算(1/(2/3)/(3/4)/(4/5)/(5/6)/./(1999/2000)/(2000/2001)/(2001/2002)
简便运算(1-1/2002)+(1-1/2002*2)+(1-1/2002*3)+.+(1-1/2002*2001)+(1-1/2002*2002)(1-1/2002)+(1-1/2002*2)+(1-1/2002*3)+.+(1-1/2002*2001)+(1-1/2002*2002)
(2002/2+2002/4+2002+6+...+2002/2002)-(2002/1+2002/3+2002/5+...+2002/2001)算清楚!
(2/2002+4/2002+6/2002+...+2002/2002)-(1/2002+3/2002+5/2002+...2001/2002)
巧算1+2-3-4+5+6-7-8+……+1997+1998-1999-2000+2001+2002
巧算1-2-3+4+5-6-7+8+9-10-11+···+2001-2002-2003
2004+2003-2002-2001+2000+1999-1998····-6-5+4+3-2-1巧算
巧算24 1 2 5 9
巧算24点1,2,4,7
巧算24点1,2,4,7
巧算((2^1+1)(2^2+1)(2^4+1)(2^8+1)+1)/2^15
简便运算(1-1/2002)+(1-1/2002*2)+(1-1/2002*3)+.+(1-1/2002*2001)
巧算(2-1/2)×(2-2/3)×(2-3/4)×……×(2-2002/2003)巧算:(2-1/2)×(2-2/3)×(2-3/4)×……×(2-2002/2003)(1+0.228-0.21)*(0.228-0.21+0.20030)-(1+0.228-0.21+0.2003)*(0.228-0.21)解方程:7(x-3)=9+X21-x=1.5(9+x)
巧算1-1/2+1/6+……
1+2+3...+2002+2003+2002+...+3+2+1=?
计算1+2+3+...+2002+2003+2002+...+3+2+1
计算1+2+3+.+2002+2003+2002+.+3+2+1