Answer:
I did number 11 and 13 for you and gave an explanation, I hope this helped, if you need more help just comment and let me know, have a great day! <3
Explanation:
If the equation is addition like number 11, all you have to do is subtract 1.7 from the solution; which is 4.98. It will look like this:
4.98 - 1.7 = 3.28
if the equation is subtraction like number 13, then you have to add 6.55 with the solution, which is 2.45, it will look like this:
6.55 + 2.45 = 9