2.12953300001300 million
3、9509050 95 1 100
4、5.950 6.0 6
5、3.04 2.95 0.09
6、-50 100
7、 15% 170
8、20.408 2040.8
9. 41% and 14%
10、①3.8-2.2= 1.6
② 1.6÷(7-3)=0.4
③2.2-0.4×3= 1
④ 1+0.4= 1.4
Typing is so hard, have a rest!