Class notes

Class notes Mathematics

1 purchase

Course
Mathematics

Institution
9th Grade

Master grade 9 mathematics with these comprehensive and easy-to-follow class notes. Perfect for students looking to improve their understanding and ace their exams.

[Show more]

Preview 3 out of 27 pages

View example

Uploaded on January 23, 2025
Number of pages 27
Written in 2024/2025
Type Class notes
Professor(s) Julia
Contains All classes

class notes

Institution
9th Grade
Course
Mathematics
Schooljaar 200

$5.17

Add to cart

Save

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

Whole numbers
Numbers

The number system is a way of representing and organizing quantities .

It provides a frame work for perfroming calculations and solving mathematical problems

Within the number system , we have several tyes of numbers that posses distinct properties and characteristics

Propertis of numbers

Diffrent types of number posses distinct properties based on their characteristics and relation ships,

Here are some key number systems we’ll discuss:

Natural numbers
Whole number
Integers
Rational numbers
Irrational numbers

Number systems

Natural number
1,2,3

Whole numbers
0,1,2,3

Integers
-2,-1,0,1,2

,Rational numbers
-2,-1,0,1,2

Irrational numbers

√5 √3 𝜋

Calculation with whole numbers

Eastimating is a helpful technique to quickly approximation the result of a calculation . it allowas you to have a rough
idea of what the answer might be without performing the exact calculation

Heres how you can estimate

For addition and subtraction : Round the number ot the nearest ten , hundred or thousand and then perform the
calculation using the rounded numbers

For multiplication and division : Round the numbers to the nearest whole number and then perform the calculation
using the rounded numbers .

Examples
Estimate the following : 68+35 round the numbers
To 70 & 40

70
+ 40 Add 70 and 40 to get an
—---- an estimated sum of 110
110

Estimate the following : 43 x 6

40
x6
—-
240

, Rounding
Rounding of involves approximately a number to a specific place value ( such as the nearest ten , hundred, ect) .

Heres how you can round off the numbers :

1. Determine the place value to which you want to round off
2. Look at the digit to the right of the desired place value
3. If the digit is 5 or greater, round up the number by increasing the desired digit by 1 and replacing all digit’s to
the right of the desired place value.

Examples

1 round 3485 to the nearst 100

3485 = 3500

2 round to the nearest 100

24627 = 24600

3 round 9721562 to the nearest 100,000

9721562 = 9700,000

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.