Reading Roman numerals

Difficulty Starter · Set t830cc

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1
What number is XVIII?
2
What number is VIII?
3
What number is XXIV?
4
What number is XVII?
5
What number is XV?
6
What number is V?
7
What number is XIII?
8
What number is XL?
9
What number is XLV?
10
What number is XII?
11
What number is XI?
12
What number is XVII?
13
What number is XX?
14
What number is XIX?
15
What number is XXX?
16
What number is XXVII?
17
What number is XIX?
18
What number is XXXVI?
19
What number is X?
20
What number is XXXI?

What is in this set

The numbers in this set run from 0 to 0.
65% of them add their letters straight through.
35% of them use a subtractive pair such as IV or XC.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 35% of the problems: every letter was added up; a smaller letter written before a larger one is taken away from it.
Answers are a whole number.

Drawing 240 problems from this page produced 46 different ones, 19% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 4 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.