Roman numerals
Method
1. Write out the mnemonic
I = 1
Value = 5
Xbox = 10
Like = 50
Cows = 100
Do = 500
Milk = 1,000
2. Lower value before higher value = subtract
Lower value after higher value = add
3. Max of 3 of the same letter in a row
How it could look in your book
For more practice of Roman numerals, download question sets by year group: