So you need to break it down further and think about the Roman numerals you can choose from. 70 can be partitioned into 50 and two 10s. 7 can be partitioned further into 5 and two 1s. These values ...
Got that? Good. Then we get to how they’re written: it starts with the biggest number, and the Is (ones) go up to three (like LIII equals 53) or they get added on to V (5) to make six (VI ...