This is two circuits for the price of one!
Your students need practice adding, subtracting, multiplying and dividing positives and negatives... and here is some great, engaging practice for them!
First Circuit: Operations with signed numbers... 20 problems with single operations (addition, subtraction, multiplication, division) such as -8 + 5 or (-2)(-3) . Students must hunt for their answer and that becomes the next problem. This format requires your students to be precise and check their work and ask questions if they get stuck!
Second Circuit: Order of operations with signed numbers... 20 problems where students must use the order of operations to simplify. Again, students must hunt for their answer and that becomes the next problem.
There is no answer key because the answers are imbedded in the circuit. The only thing the teacher needs to do is work the circuit ahead of the students to gage how much time / additional explanation the students might need.