I got those from a cereal box.
You can use each number 1 to 9 only once.
Operation should match the value in the green box horizonal and vertical
My problem is Operation Order isnt specify in the instructions
But because those puzzles are usually for childrens my guess is precedence is left to right and up down.
Also for puzzle A using normal operator presedence
first row will be
9 - XY = 2 --> XY = 7
and there isnt any combination using 1 to 9 to solve that.
* EDIT * My mistake 1*7 = 7 doh
I could solve B but not A using that order.
You can show your B solution
But the correct answer go for the one finding a solution for A or proving there isnt a solution.