【6道小数简算,4道分数简算或计算】为一组,有几组发几组,急!

3.582-6.991+6.418-2.009

5.3237-15.6958-2.3237+20.6958

1.258+2.258+3.258+4.258+5.258+6.258+7.258+8.258+9.258

1.999+2.999+3.999+4.999+5.999+6.999+7.999+8.999+9.999+6.09

9.684+9.999+1.317

8.8888+6.6666+4.4444+2.2222

1/(2×3)+1/(3×4)+1/(4×5)+1/(5×6)+1/(6×7)

1/6+1/12+1/20+1/30+1/35+1/42+1/7

1/2+1/4+1/8+1/16+1/32+1/64+1/128

1/3+1/6+1/12+1/24+1/48+1/96+1/192