**BASIC OPERATIONS ON WHOLE NUMBERS**

CONTENT
- Multiplication of Positive and Negative Numbers
- Division of Integer
- 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:
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