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# BASIC OPERATIONS ON WHOLE NUMBERS

CONTENT
1. Multiplication of Positive and Negative Numbers
2. Division of Integer
3. Word Problems

## Multiplication of Whole Numbers

The numbers used in multiplication have special names as illustrated below: 141 (factor) × 17 (factor) = 2397 (product) The product is a multiple of each of the factors, i.e. 2397 is a multiple of 141 2397 is a multiple of 17 Multiplication is a short way of writing repeated additions. For example, 3 × 4 = 3 lots of 4 = 4 + 4 + 4 = 12 With directed numbers, (+4) + (+4) + (+4) = 3 lots of (+4) = 3 × (+4) The multiplier is 3. It is positive. Thus, (+3) × (+4) = (+4) + (+4) + (+4) = +12 (+3) × (+4) 1 × (+4)     ILLUSTRATION TO BE ADDED SOON   The illustration above shows 1 × (+4) and (+3) × (+4) as movement on the number line. The movements are in the same direction from 0. Similarly, (-2)+ (-2) + (-2) + (-2) + (-2) = 5 lots of (-2) = 5 × (-2) The multiplier is 5. It is positive. Thus, (+5) × (-2) = (-2) + (-2) + (-2) + (-2) + (-2) = -10 This is illustrated below:

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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