It depends...on what you want to achieve. If you are an untrained person or a beginner, then do all 10 rounds of the basic jump rope routine. After that, you can increase the number of rounds you do by one round for each week you train.
Here's what you do: Start with two rounds of 10 jumps each. Then, do as many rounds of 20 jumps as you can. Continue up to 50 rounds. Then, stop and rest for a few minutes. Repeat this process three more times.