1. The original formula is:10+1000+100000+1000000+65438+1000000+000000+.

2. Put them into one group and get:1+2010 *1/2 =1006.

3.=20 12*3000-20 1 1*3000-20 12=3000-20 12=988

4.(2+3+...+ 10)*? =3996

54*? =3996

? =74

Very satisfied with the adoption, thank you.