Problem Set 1 – Roman Numerals 1 to 20Class 5 Maths · Chapter 1 Roman Numerals · Problem Set 1 – Maharashtra Board

Textbook: Mathematics – Class 5 (Balbharati, official free PDF) · pages 1–2

Why does the clock show IX instead of 9? Learn the four rules for writing 1 to 20 with I, V and X, and see why our decimal system is easier.

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Summary: Problem Set 1 – Roman Numerals 1 to 20

Long ago in Europe, Roman capital letters were used to write numbers. These are called Roman numerals: I = 1, V = 5, X = 10.

Roman numerals have no symbol for zero, and a symbol's value does not change with its place.

Four rules: repeat I or X to add (XX = 20); never repeat a symbol more than 3 times, and never repeat V; a smaller symbol on the right adds (XV = 15); I on the left of V or X subtracts (IV = 4, IX = 9).

To write a number, first break it into tens, fives and ones, then use the rules: 18 = 10 + 5 + 3 = XVIII, 14 = 10 + 4 = XIV.

Other Roman numerals: L = 50, C = 100, D = 500, M = 1000. Our decimal system (digits 0–9, place value) was invented in ancient India and is much easier.

Key points to remember

  • I = 1, V = 5, X = 10
  • No zero in Roman numerals
  • I or X can repeat at most 3 times; V never repeats
  • Smaller on the right → add (VI = 6)
  • I on the left of V or X → subtract (IV = 4, IX = 9)
  • Only one I may stand before V or X (8 is VIII, not IIX)
  • 14 = XIV, 19 = XIX
  • L = 50, C = 100, D = 500, M = 1000
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Roman Numerals Problem Set 1 – question answers

1 question

Questions students asked about this chapter, answered and checked by TalentJR.

Explain Roman Numerals Problem Set 1 in simple words

What are Roman Numerals?

Roman numerals are a way of writing numbers using letters from the Latin alphabet. The main letters used are:

  • I = 1
  • V = 5
  • X = 10
  • L = 50
  • C = 100
  • D = 500
  • M = 1000

Problem Set 1 Overview

This problem set helps you learn how to write numbers in Roman numerals and vice versa.

Question 1: Write numbers 1 to 20 in Roman numerals.

You need to write each number from 1 to 20 using Roman numerals. For example, 1 is I, 2 is II, 3 is III, and so on up to 20 which is XX.

Question 2: Convert Roman numerals to international numerals.

Here, you will take Roman numerals like V, VII, and X and write them as regular numbers. For example:

  • V = 5
  • VII = 7
  • X = 10

Question 3: Fill in the empty boxes.

You will see some Roman numerals with missing parts, and your job is to fill them in correctly.

Question 4: Write numbers in Roman numerals.

You will be given regular numbers like 9, 2, and 17, and you need to convert them into Roman numerals. For example:

  • 9 = IX
  • 2 = II
  • 17 = XVII

Question 5: Check if the Roman numerals are correct.

You will see a table with international numerals and their Roman numeral forms. If the Roman numeral is correct, you put a check mark (/) next to it. If it’s wrong, you put an X and write the correct Roman numeral.

Additional Questions

There are more questions that help you practice writing and converting numbers in Roman numerals, including matching, circling correct answers, and comparing numbers.

Conclusion

This problem set is all about practicing how to read and write Roman numerals. It helps you understand both the Roman numeral system and how it compares to our regular number system.

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