Basic Operations on Whole Numbers (Addition and Subtraction)

Complexity: Standard

<h1><strong>WHOLE NUMBERS</strong></h1> CONTENT <ol> <li>Order of Operations (PEMDAS/BODMAS)</li> <li>Addition and Subtraction of Numbers with Place Values</li> <li>Use of Number Line</li> <li>Addition and Subtraction of Positive and Negative Numbers</li> </ol> <br> <h2><strong>Order of Operations (PENDAS/BODMAS)</strong></h2> <strong>Can you answer this?</strong>7 - 1 × 0 + 3 ÷ 3 = ?In arithmetic, there are two types of components: the numbers themselves and the operators (also called operations) that tell you what to do with those numbers. The <strong><em>basic operators</em></strong> in arithmetic are addition (sum), subtraction (difference), multiplication (product) and division (quotient).So, in the sum 7 × 3 + 5 there are three numbers; 7, 3 and 5 and two operators, a multiplication (×) and an addition (+). The order of operations used throughout mathematics, science, technology and many computer programming languages is expressed here. <ol> <li>Exponents (index) and roots</li> <li>Multiplication and division</li> <li>Addition and subtraction</li> </ol> The definitive order of operations is summed up in the acronym <strong>BODMAS</strong>, which stands for Brackets, Order, Divide, Multiply, Add, Subtract. It would be easier if BODMAS was recognised worldwide, but unfortunately it isn’t.<img class="size-full wp-image-23462 aligncenter" src="" alt="Whole numbers - BODMAS" width="458" height="149" />

Whole Numbers

Complexity: Standard

Unfortunately we could not locate the table you're looking for.<h1><strong>WHOLE NUMBERS</strong></h1> CONTENT <ol> <li>Development of number system</li> <li>Place values</li> <li>Counting: tens; hundreds; thousands; millions;…trillions</li> <li>Translating numbers written in figures to words</li> <li>Quantitative reasoning</li> </ol> <br> <h2><strong>Development of Number System</strong></h2> 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.  <h2><strong>The Roman Number System</strong></h2> 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.<strong>Example 1: </strong>Write these numbers in Roman numerals.(a) 25 (b) 105 (c) 49 (d) 2011<strong>Solution:</strong>(a) 25 = XXV(b) 105 = CV(c) 49 = XLIX(d) 2011 = MMXI <strong>Example 2: </strong>What numbers do these Roman numerals represent?(a) XLVI (b) XCIX (c) MMCMLIV (d) MMMDCISolution:(a) XLIV = 46(b) XCIX = 99(c) MMCMLIV = 2954(d) MMMDCI = 3601<strong>CLASS ACTIVITY</strong>1. Write these numbers in Roman Numerals(a) 352 (b) 1 257 (c) 24562. Add the following Roman numerals and give your answers in figures(a) XXV and CV (b) XXIV and MDCIX.  <h2><strong>What are whole numbers? </strong></h2>

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