Elementary Arithmetic and Neg Essay

Submitted By tweedy99
Words: 368
Pages: 2

pos x pos = pos neg x pos = neg neg x neg = pos pos x neg = neg same with division

Don’t forget
BODMAS:
5 - 2 (3 - 6)=?
5-6+12
-1+12
=11

15- -10 = 25

examples:
To solve the equation 10 -

2x
=4
5

first subtract 10 from both sides. Then multiply both sides by 5 and divide both sides by 2
6+12 ÷ 3 - (2+12x0) =
Brackets first 6+ 12 ÷3- 2 then division 6+ 4-2 then right to left 10 - 2 the answer is 8

Convert 0.73 into a percentage: you could multiply 0.73 x 100 (multiply the decimal by 100)
= 73% or you could move the decimal to spots to the right.

If Stephanie got 76% in her maths test, what fraction did she get? just put 76 over 100 and don’t forget to simplify
= 76/100 =38/50= 19/25

x x The solution to the equation 3( +4) = 6 expand brackets.= 3
+ 12 = 6
-9
then subtract 6 from each sides. then subtract 12 and divide both sides by 3 x=7 x

x

x-9

When a is equal to 3, b is equal to -4 and c is equal to
-2 and they are substituted into the expression b squared- -2ac the value is: substitute: (-4)squared -2 (3) (-2) add up16 + 12
A phone that normally sells for $800 was reduced by 8%
What is the reduced selling price?
8/100 x 800/1 = 64 or 0.8 x 800= 64.0

In12 years time, when I divide my age by 4, the result is
10, how old was I, 5 years ago? first we will substitute the unknown number with the letter F
F+ 12 ÷ 4 = 10 then we will solve.
Tips
first x both sides by > F +12 = 40
Don’t forget the imaginary x before the brackets. eg then - 12