Answer: 0.78-(1-0.34)
Step-by-step explanation:
0.78 must be on the outside of the parenthesis'
We need to find out the length of Sergei's rod, so we need to subtract it by one
1-0.34=0.66
Now do 0.78-0.66
0.12
That is how you know you are finding out the difference in length.
