Sekadar selingan...

Lawak jenaka maths...

Seorang cikgu masuk ke dalam bilik darjah.

Cikgu : Hari ini kita akan belajar mengira..

Murid-Murid : Baik cikgu..

Si guru mula bertanya kepada salah seorang muridnya, Ahmad

Cikgu : Ahmad, jika 1 biji timun ditambahkan 2 biji epal tambah 3 biji nenas dan 4 biji jambu jdi berapa...?

Ahmad : Jadi ROJAK cikgu..!! Nyam2..

Cikgu : Hah...??

DIRECTED NUMBERS

DIRECTED NUMBERS


The numbers which have a direction and a size are called directed numbers.

Multiplication and Division of Integers


MULTIPLICATION

RULE 1: The product of a positive integer and a negative integer is negative.

RULE 2: The product of two positive integers is positive.

RULE 3: The product of two negative integers is positive.

DIVISION

RULE 1: The quotient of a positive integer and a negative integer is negative
RULE 2: The quotient of two positive integers is positive.


RULE 3: The quotient of two negative integers is positive.

SUMMARY OF MULTIPLICATION AND DIVISION RULES
# If the signs are different the answer is negative.
# If the signs are alike the answer is positive
#


example (Multiplication)

Rule 1: 1. (+4) x (-2) = -8
2. (-2) x (+5) = -10

Rule 2: 1. (+6) x (+8) = +48
2. (+6) x (+2) = +12

Rule 3: 1. (-6) x (-8) = +48
2. (-2) x (-4) = +8

example ( Division):

Rule 1: 1. (-8) / (+4) = -2

2. (-12) / (+6) = -2

Rule 2: 1. (+6) / (-3) = -2

2. (+24) / (-6) = -4

Rule 3: 1. (+9) / (+3) = +3

2. (+16) / (+4) = +4

Rule 4: 1. (-6) / (-2) = +3

2. (-42) / (-7) = +6

SQUARES AND SQUARE ROOTS

SQUARES AND SQUARE ROOTS

HOW TO SQUARE A NUMBER???

To square a number, just multiply it by itself.
Example:
What is 3 squared?

3 x 3 = 9

"Squared" is often written as a little 2 like this:
42=16
2 is means squared


SQUARE ROOTS

A square root goes the other way:

3 squared is 9, so a square root of 9 is 3

A square root of a number is ...
... a value that can be multiplied by itself to give the original number.

A square root of 9 is ...
... 3, because when 3 is multiplied by itself you get 9.

The Square Root Symbol

This is the special

symbol that means "square root"

you would say "square root of 9 equals 3"