# WHOLE NUMBERS

CONTENT
1. Development of number system
2. Place values
3. Counting: tens; hundreds; thousands; millions;…trillions
4. Translating numbers written in figures to words
5. Quantitative reasoning

## Development of Number System

There were many ancient ways of writing numbers part of which are the Hindu Arabic system, tally system, Roman system, etc. While so many have gone into extinction, the Roman system is still in use up to date.

## The Roman Number System

The Roman number system was developed about 300BC. The Romans used capital letters of the alphabet for numerals. The tables below show how to use the letters.
1I11XI30XXX500D
2II12XII40XL600DC
3III13XIII50L700DCC
4IV14XIV60LX800DCCC
5V15XV70LXX900CM
6VI16XVI80LXXX1,000M
7VII17XVII90XC2,000MM
8VIII18XVIII100C3,000MMM
9IX19XIX200CC4,000MV
10X20XX300CCC5,000V
400CD10,000X
Example 1: Write these numbers in Roman numerals. (a) 25 (b) 105 (c) 49 (d) 2011 Solution: (a) 25 = XXV (b) 105 = CV (c) 49 = XLIX (d) 2011 = MMXI   Example 2: What numbers do these Roman numerals represent? (a) XLVI (b) XCIX (c) MMCMLIV (d) MMMDCI Solution: (a) XLIV = 46 (b) XCIX = 99 (c) MMCMLIV = 2954 (d) MMMDCI = 3601 CLASS ACTIVITY 1. Write these numbers in Roman Numerals (a) 352 (b) 1 257 (c) 2456 2. Add the following Roman numerals and give your answers in figures (a) XXV and CV (b) XXIV and MDCIX.

## What are whole numbers?

Lesson tags: JSS1 Mathematics, JSS1 Mathematics Evaluation Questions, JSS1 Mathematics Evaluation Questions First Term, JSS1 Mathematics First Term, JSS1 Mathematics Objective Questions, JSS1 Mathematics Objective Questions First Term, Mathematics Lesson Notes, Mathematics Objective Questions
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