来自华翔的问题
帮手简算2002乘20032003-2003乘200220022+4+6+8+···+20040.888乘125乘73+999乘3
帮手简算
2002乘20032003-2003乘20022002
2+4+6+8+···+2004
0.888乘125乘73+999乘3
1回答
2020-04-26 13:24
帮手简算2002乘20032003-2003乘200220022+4+6+8+···+20040.888乘125乘73+999乘3
帮手简算
2002乘20032003-2003乘20022002
2+4+6+8+···+2004
0.888乘125乘73+999乘3
2002乘20032003-2003乘20022002=2002x20032003-(2002+1)20022002=2002x20032003-2002x20022002-20022002=2002(20032003-20022002)-20022002=2002x10001-20022002=2002x1001-2002x1001=02+4+6+8+···+2004=100500...