Chapter 2 - Integers

Question 0

What are the rules for multiplying and dividing integers?

Answer 0

Multiplying: + x + = +, - x - = +, + x - = -, - x + = -
Dividing: + div + = +, - div - = +, + div - = -, - div + = -
When the sign is the same, the answer is positive.
When the sign is different, the answer is negative.

Question 1

What are the rules for adding and subtracting integers?

Answer 1

1. If both signs are the same, add/subtract the numbers and retain the sign.
2. If both signs are different,add/subtract the numbers and keep the sign of the bigger number.

Question 2

What is the trick for answering this: ‘Say if the following is true or false:
6<4?

Answer 2

The answer is ‘False’. The trick is, for the answer to be true, the < must be facing the bigger number or ‘ the crocodile always eats the bigger number’.