# Maths :)

Just some revision notes to read through!

- Created by: Annieee
- Created on: 28-05-09 12:04

First 152 words of the document:

1. Number and Algebra.

Multiplying and dividing negative numbers

E.g.

-2*+4

2*4=8, and - * + is equivalent to -. So -2*+4=-8

-6*-3

6*3=18 and -*- is equivalent to +, so -6*-3 =+8

+6*-4/-2

+6*4= -24, -24/-2=+12

Key

-*+=-

-*-=+

-/-=+

-- = +

+-= -

1.

a) -7+8 = 1

j) -5+-4--7=

4.

a) +2*-3= -6

o) -2*+4*-2= -16

HCF and LCM -

E.g.

HCF stands for highest common factor

LCM stands for lowest common multiple

Find the LCM of two numbers

a) 3 and 7 = 21

b) 6 and 9 = 18

A factor is a smaller number that divides exactly into a larger

number.

e.g. 2, 3 and 4 are all factors of 12

Find the HCF of two numbers

a)15 and 21 = 3

b) 16 and 24 = 8

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