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Easy Fractions, Rounding & Converting Maths Guide for KS2 and Year 7

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Ruby

09/06/2023

Maths

Maths

Easy Fractions, Rounding & Converting Maths Guide for KS2 and Year 7

Fractions, decimals, percentages, and rounding numbers are fundamental concepts in mathematics. This guide covers various aspects of these topics, including converting between different representations, solving fraction problems, and applying rounding rules. It also explores powers, roots, and standard form notation.

  • Fractions can be expressed as parts of a whole or used in calculations
  • Decimals and percentages are alternative ways to represent fractional values
  • Rounding numbers involves adjusting values to a specified level of precision
  • Powers and roots are used to represent repeated multiplication and its inverse
  • Standard form is a way to express very large or small numbers concisely
...

09/06/2023

361

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Fraction Problems

This section demonstrates how to solve practical problems involving fractions.

Example: Rachel needs to determine how many packs of butter to buy for 80 cupcakes, where each cupcake requires 2/25 of a pack.

The solution involves multiplying the fraction by the number of cupcakes and rounding up to the nearest whole pack:

80 × 2/25 = 160/25 = 6.4 packs

Highlight: When dealing with real-world problems, remember to round up to the nearest whole unit when partial units aren't practical.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Comparing Fractions

This page explains how to compare fractions by finding a common denominator.

Example: To determine which fraction is closer to 1, 2/3 or 9/7, convert both to a common denominator of 21:

2/3 = 14/21 9/7 = 27/21

Subtracting from 1 (21/21):

21/21 - 14/21 = 7/21 21/21 - 27/21 = -6/21

Highlight: The fraction with the smaller difference from 1 (in absolute value) is closer to 1. In this case, 9/7 is closer to 1 than 2/3.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Fractions, Decimals, and Percentages

This page provides a comprehensive table showing the relationships between fractions, decimals, and percentages.

Example:

  • 1/2 = 0.5 = 50%
  • 1/4 = 0.25 = 25%
  • 3/4 = 0.75 = 75%

Highlight: Understanding these equivalences is crucial for converting fractions, decimals, and percentages in various mathematical contexts.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

More Fractions, Decimals, and Percentages

This page continues with additional examples of fraction, decimal, and percentage equivalences.

Example:

  • 1/10 = 0.1 = 10%
  • 1/5 = 0.2 = 20%
  • 3/8 = 0.375 = 37.5%

Highlight: Recognizing these patterns helps in quickly converting between different representations of the same value.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Converting Between Fractions, Decimals, and Percentages

This section explains the process of converting between fractions, decimals, and percentages.

Example: To convert 7/20 to a decimal and percentage:

  1. Divide 7 by 20: 7 ÷ 20 = 0.35
  2. Multiply by 100 for percentage: 0.35 × 100 = 35%

Highlight: When converting from a decimal to a fraction, place the digits after the decimal point over a power of 10 (e.g., 0.61 = 61/100).

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Rounding Numbers

This page introduces the concept of rounding numbers to a specified decimal place.

Example: Rounding 13.72 to one decimal place:

  1. Identify the last digit to keep (7)
  2. Look at the next digit (2) as the decider
  3. Since 2 < 5, the last digit stays the same Result: 13.7

Highlight: The digit to the right of the rounding position is called the "decider" and determines whether to round up or down.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Rounding Numbers (Continued)

This page provides another example of rounding numbers, this time to two decimal places.

Example: Rounding 7.45839 to two decimal places:

  1. Identify the last digit to keep (5)
  2. Look at the next digit (8) as the decider
  3. Since 8 ≥ 5, round up Result: 7.46

Highlight: When the decider is 5 or greater, round up the last digit to be kept.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Rounding Numbers (Special Cases)

This section covers a special case in rounding where rounding up a 9 is necessary.

Example: Rounding 45.698 to two decimal places:

  1. Identify the last digit to keep (9)
  2. Look at the next digit (8) as the decider
  3. Since 8 ≥ 5, round up 9 to 10
  4. Replace 9 with 0 and add 1 to the digit on the left Result: 45.70

Highlight: When rounding up a 9, it becomes 0, and you must add 1 to the next digit to the left.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

View

Significant Figures

This page introduces the concept of significant figures in rounding numbers.

Definition: The first significant figure is the first non-zero digit from the left. Subsequent digits, including zeros, are counted as significant figures.

Example: In 0.002309, the significant figures are: 1st: 2 2nd: 3 3rd: 0 4th: 9

Highlight: Understanding significant figures is crucial for maintaining precision in scientific and engineering calculations.

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Maths

361

9 Jun 2023

19 pages

Easy Fractions, Rounding & Converting Maths Guide for KS2 and Year 7

user profile picture

Ruby

@ruby123456789

Fractions, decimals, percentages, and rounding numbers are fundamental concepts in mathematics. This guide covers various aspects of these topics, including converting between different representations, solving fraction problems, and applying rounding rules. It also explores powers, roots, and standard form notation.

... Show more
fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

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Fraction Problems

This section demonstrates how to solve practical problems involving fractions.

Example: Rachel needs to determine how many packs of butter to buy for 80 cupcakes, where each cupcake requires 2/25 of a pack.

The solution involves multiplying the fraction by the number of cupcakes and rounding up to the nearest whole pack:

80 × 2/25 = 160/25 = 6.4 packs

Highlight: When dealing with real-world problems, remember to round up to the nearest whole unit when partial units aren't practical.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Comparing Fractions

This page explains how to compare fractions by finding a common denominator.

Example: To determine which fraction is closer to 1, 2/3 or 9/7, convert both to a common denominator of 21:

2/3 = 14/21 9/7 = 27/21

Subtracting from 1 (21/21):

21/21 - 14/21 = 7/21 21/21 - 27/21 = -6/21

Highlight: The fraction with the smaller difference from 1 (in absolute value) is closer to 1. In this case, 9/7 is closer to 1 than 2/3.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Fractions, Decimals, and Percentages

This page provides a comprehensive table showing the relationships between fractions, decimals, and percentages.

Example:

  • 1/2 = 0.5 = 50%
  • 1/4 = 0.25 = 25%
  • 3/4 = 0.75 = 75%

Highlight: Understanding these equivalences is crucial for converting fractions, decimals, and percentages in various mathematical contexts.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

More Fractions, Decimals, and Percentages

This page continues with additional examples of fraction, decimal, and percentage equivalences.

Example:

  • 1/10 = 0.1 = 10%
  • 1/5 = 0.2 = 20%
  • 3/8 = 0.375 = 37.5%

Highlight: Recognizing these patterns helps in quickly converting between different representations of the same value.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Converting Between Fractions, Decimals, and Percentages

This section explains the process of converting between fractions, decimals, and percentages.

Example: To convert 7/20 to a decimal and percentage:

  1. Divide 7 by 20: 7 ÷ 20 = 0.35
  2. Multiply by 100 for percentage: 0.35 × 100 = 35%

Highlight: When converting from a decimal to a fraction, place the digits after the decimal point over a power of 10 (e.g., 0.61 = 61/100).

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Rounding Numbers

This page introduces the concept of rounding numbers to a specified decimal place.

Example: Rounding 13.72 to one decimal place:

  1. Identify the last digit to keep (7)
  2. Look at the next digit (2) as the decider
  3. Since 2 < 5, the last digit stays the same Result: 13.7

Highlight: The digit to the right of the rounding position is called the "decider" and determines whether to round up or down.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

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Rounding Numbers (Continued)

This page provides another example of rounding numbers, this time to two decimal places.

Example: Rounding 7.45839 to two decimal places:

  1. Identify the last digit to keep (5)
  2. Look at the next digit (8) as the decider
  3. Since 8 ≥ 5, round up Result: 7.46

Highlight: When the decider is 5 or greater, round up the last digit to be kept.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Rounding Numbers (Special Cases)

This section covers a special case in rounding where rounding up a 9 is necessary.

Example: Rounding 45.698 to two decimal places:

  1. Identify the last digit to keep (9)
  2. Look at the next digit (8) as the decider
  3. Since 8 ≥ 5, round up 9 to 10
  4. Replace 9 with 0 and add 1 to the digit on the left Result: 45.70

Highlight: When rounding up a 9, it becomes 0, and you must add 1 to the next digit to the left.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Significant Figures

This page introduces the concept of significant figures in rounding numbers.

Definition: The first significant figure is the first non-zero digit from the left. Subsequent digits, including zeros, are counted as significant figures.

Example: In 0.002309, the significant figures are: 1st: 2 2nd: 3 3rd: 0 4th: 9

Highlight: Understanding significant figures is crucial for maintaining precision in scientific and engineering calculations.

fractions without a calculation
Expressing as a fraction
eig. wunte 180 as a fraction of 80
winke the first number over the 180=9
80 4
secon

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Rounding to Significant Figures

This section demonstrates how to round numbers to a specified number of significant figures.

Example: Rounding 506.07 to two significant figures:

  1. Identify the first two significant digits (50)
  2. Look at the next digit (6) as the decider
  3. Since 6 ≥ 5, round up Result: 510

Highlight: When rounding to significant figures, you may need to add zeros to maintain the correct magnitude of the number.

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THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

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This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user