1) 1,32: 1,2-0,8 1,7+3,B

2) 2,2

3) -3 (-3,9)-9,6

4) 3,6+1,08: 1,2

5) 4,1+5,3

Sure, I can help you solve these problems. Here are the solutions:

1) 1,32: 1,2-0,8 1,7+3,B
= 1.32 : (1.2 - 0.8) + (1.7 + 3.11) (B is equivalent to 0.11)
= 1.32 : 0.4 + 4.81
= 3.3 + 4.81
= 8.11

2) 2,2
This is a complete expression, there is nothing to solve or simplify.

3) -3 (-3,9)-9,6
= -3 x (-3.9) - 9.6
= 11.7 - 9.6
= 2.1

4) 3,6+1,08: 1,2
= 3.6 + (1.08 ÷ 1.2)
= 3.6 + 0.9
= 4.5

5) 4,1+5,3
= 9.4

I hope this helps! Let me know if you have any more questions.