maths trial and error

learning outcome
we are learning to solve a problem by trial and error

success criteria
I will have tried different ways of solving the problem
I will check to see if there is more than one way
I will have a correct answer

the reflection
the problem was that we had 7 cards with a 3, =, 5, x, +, 7, 8, and with those cards we had to make a question that makes sense.
we tried about 7 times we didn't have any clue what the answer was and I thought it was impossible then I remembered the = doesn't always have to be in the middle. so I put it at the end.