It appears the question is asking you to make mathematical statements.
Basically, just find a way to use the numbers above to make your own addition and subtraction problems.
ADDITION
2.47 + 7.1 = 9.57
7.1 + 2.47 = 9.57
SUBTRACTION
9.57 - 7.1 = 2.47
9.57 - 2.47 = 7.1
