Additive inverses, because their sum is 0
I think it might be B
because from 9+1 = 10 we can change to 9=10-1
and 10+6=16 no need to change
then we solve the problem with the equation
16 - 9
10+6 - (10-1)
10+6-10+1
7
thats the answer
358 will be rounded to 360 and 292 will be rounded to 290 so 360-290 =70
