简算与计算1.6.7×12+6.7×35+6.7×52+6.72.9999999×8888888÷66666663.1+2+4+8+16+32+64+128+2564.321×654÷987÷654×987÷3215.100+99-98-97+96+95-94-93+…+4+3-2-1写出过程,要简算

Question

简算与计算
1.6.7×12+6.7×35+6.7×52+6.7
2.9999999×8888888÷6666666
3.1+2+4+8+16+32+64+128+256
4.321×654÷987÷654×987÷321
5.100+99-98-97+96+95-94-93+…+4+3-2-1
写出过程,要简算

Answer 1

6.7*12+6.7*35+6.7*52+6.7
=6.7*12+6.7*35+6.7*52+6.7*1
=6.7*（12+35+52+1）
=6.7*100
=670