Cl-5 (Math) | Ch-1 | Roman Numerals

Pre-Requisites

• Class 4

Learning Objective

On successful completion of this lesson, students will be able to:

• demonstrate basic knowledge of numerals, types of numerals, roman numerals, and Hindu-Arabic numerals.
• analyze the rule of writing roman numerals.
• develop problem-solving skills.
• apply in real life.

Dictionary

• Numeral: Number
• >: Greater than
• <: Lesser than
• =: Equal to
• Ascending: Increasing
• Descending: Decreasing
• Order: Sequence

1.1 Definition & Important Points

=> Numeral: It is nothing but numbers e.g 1, 2, 3, I, II, III, etc.

=> Numerals: 2 types

(a) Hindu – Arabic Numeral e.g 1, 2, 3 etc.

(b) Roman Numerals e.g I, II, III etc.

=> Roman Numerals: 7 basic symbols

• I
• V
• X
• L
• C
• D
• M

Table 1.1

1.2 Rules to write Roman Numerals

Rule I: Roman numeral repeats mean Addition.

e.g I =1 ; II= 1+1=2 ; III=1+1+1=3

Note:

• Only I, X, C & M can be repeated.
• I, X, C, & M can be repeated only for a maximum of 3 times.

Rule II: A smaller numeral is written on the right of a larger numeral means the addition of the smaller numeral with the larger numeral.

e.g XI=10+1=11, VI=5+1=6

Rule III: Reverse of rule II means Subtraction

e.g IX=10-1=9, IV=5-1=4

Note:

• V, L & D can never be subtracted.
• I can be subtracted from V & X only.
• X can be subtracted from L & C.
• C can be subtracted from D & M only.

Rule IV: When a smaller numeral is kept between two larger numerals, it is subtracted from the larger numeral from its right larger numeral.

1.3 Tables

Table 1.2: Roman Numeral from I – C

Table 1.3: Roman Numeral from CI – CC

Table 1.4: Roman Numeral from CCI – CCC

Table 1.5: Roman Numeral from CCCI – CD

Table 1.6: Roman Numeral from CDI – D

Table 1.7: Roman Numeral from DI – DC

Table 1.8: Roman Numeral from DCI – DCC

Table 1.9: Roman Numeral from DCCI – DCCC

Table 1.10: Roman Numeral from DCCCI – DCD

Table 1.11: Roman Numeral from DCDI – M

Table 1.12: Remember it

1.4 Practice Sets

1. Fill Type
2. Match Type
3. Order Type
4. Conversion Type
5. Compare Type
6. Error Type
7. Statement Type
8. True/False Type
9. Related Type
10. Day-to-Day Type
11. Miscellaneous Type

Set-1 (Reference Book)

1.Write the Roman numeral for each of the following Hindu-Arabic numerals.

2. Write the Hindu-Arabic numerals corresponding to each of the following.

3. Which of the following are meaningless?

4. Compare and put symbol >, < or =in the placeholder.

5. Fill in the blanks.

6. Cross (x) the Roman numerals which are not written correctly.

7. Write the following Roman numerals in ascending order.

8. Write the following Roman numerals in descending order.

9. Solve & write the answer in Roman numerals.

10. Complete the following table.

Set-2 (NCERT Book)

Set-3

Set-4

Set-5

1.5 Quiz

1.In Roman numerals, there are only……… basic symbols.

(a). 7 (b). 9 (c). 10 (d). 8

2. Roman numeral for the smallest 4-digit number is

(a). X (b). C (c). M (d). D

3. Which of the following numerals cannot be repeated?

(a). I (b). V (c). X (d). C

4. IX+XV+XX=

(a). 35 (b). 40 (c). 44 (d). 45

5. I can be subtracted from

(a). V (b). V&X (c). X&C (d). V,X&C

6. Compare: CDXLIX ( ) CDLX

(a). > (b). < (c). = (d). None

7. XIX + XXIX=

(a). XXXVIII (b). XLVII (c). XXXIX (d). XLVIII

8. CC – CXXV=

(a). LXV (b). LXXV (c). LXXXV (d). XCV

9. XII /II=

(a). V (b). VI (c). VII (d). VIII

10. XII x X=

(a). CXX (b). CX (c). CXXX (d). None

1.6 Test

1.7 Exam

The exam will be conducted after the completion of the course.

1.8 Ask Question

Ask your doubts here

…..The End…..

Other Notes

• Counting from one to hundred: एक से लेकर सौ तक गिनती
• Punctuation Mark: विराम चिन्ह
• Roman Numerals : 1 to 3000
• Testing
• Words Start with letter G
• Words Start with letter F
• Words Start with letter E
• Words Start with letter D
• Words Start with letter C
• Words Start with letter B

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