How do I do all this math work?

Pretty simple, I’m just struggling to get all the math work done at the pace they want me to finish it at. The chapter has 44 exercises and I get 5-10 minutes to complete it. Also, I don’t want to spend 10-20 minutes on a math exercise when everyone else can easily do it in less than 5 minutes. <br><br>I can solve it by memorizing it, but I’m not sure if I will remember it long term. So, how can I do all this work in the minimal amount of time and retain the information?