Reading Roman numerals

Difficulty Stretch · Set rfin1e

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1
What number is CDLXXVIII?
2
What number is CMIII?
3
What number is MXXII?
4
What number is DCXXI?
5
What number is CMLXVII?
6
What number is MCCCXXVI?
7
What number is MXXVI?
8
What number is MCMLIII?
9
What number is DXXXI?
10
What number is MDI?
11
What number is MVIII?
12
What number is MCMXLIV?
13
What number is MDLV?
14
What number is CCCXLI?
15
What number is MDCCXI?
16
What number is MDCCCXLIV?
17
What number is MDCCCXXI?
18
What number is CMIII?
19
What number is MCDLIV?
20
What number is MCCXXXI?

What is in this set

The numbers in this set run from 0 to 0.
54% of them use a subtractive pair such as IV or XC.
46% of them add their letters straight through.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 54% 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 222 different ones, 93% — so a sheet of 20 is a new sheet almost every time.

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.