Headscratcher

Insert the correct mathematical signs ( + ) ( - ) ( x ) ( :- ) to make
the following calculations work:

7 8 20 32 = 44
9 3 42 12 = 94.5
8 2 12 9 = 37
6 7 15 13 = 44
5 32 6 20 = 18.75


I couldn't do it.
Finding the solution can't be just trial and error.
Who wants to have a go ?

Originally posted by ivanhoe

Insert the correct mathematical signs ( + ) ( - ) ( x ) ( :- ) to make
the following calculations work:

7 8 20 32 = 44
9 3 42 12 = 94.5
8 2 12 9 = 37
6 7 15 13 = 44
5 32 6 20 = 18.75


I couldn't do it.
Finding the solution can't be just trial and error.
Who wants to have a go ?

Sure , a red Ferrari is coming your way !! 😀