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Rounding to 1 and 2 Decimal Places - Corbettmaths

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Rounding to Significant Figures - Corbettmaths

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Estimation by rounding to significant figures

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Estimation by rounding to significant figures

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Estimation by rounding to significant figures

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How to - estimate by rounding to 1 sig fig

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Practise your approximation and rounding skills with this online, self-marking exercise.

This is level 2; Rounding numbers to one decimal place. You can earn a trophy if you get at least 9 correct.

Description of Levels

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Level 1 - Rounding numbers to the nearest whole number

Level 2 - Rounding numbers to one decimal place

Level 3 - Rounding numbers to two decimal places

Level 4 - Rounding numbers to one significant figure

Level 5 - Rounding numbers to two significant figures

Level 6 - Rounding numbers to three significant figures

Level 7 - Rounding numbers to the nearest ten, hundred etc

More on this topic including lesson Starters, visual aids, investigations and self-marking exercises.

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Curriculum Reference

Example

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

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Practise your approximation and rounding skills with this online, self-marking exercise.

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Adding, Subtracting, Multiplying & Dividing fractions

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Adding, Subtracting, Multiplying & Dividing fractions

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Fraction Review | How to Add, Subtract, Multiply, and Divide Fractions

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Ordering Fractions | How to Order Fractions with Unlike Denominators

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How to Find a Fraction of a Whole Number | Fractions of Whole Numbers

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Multiplying & Dividing fractions QUESTIONS

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Multiplying & Dividing fractions QUESTIONS

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Collecting Like Terms Practice Questions

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The Corbettmaths Questions and Answers on Collecting Like Terms

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The Corbettmaths Practice Questions and Answers on Expanding a Bracket

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Expanding Two Brackets Practice Questions

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The Corbettmaths Practice Questions on Expanding Two Brackets

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Solving equations with letters on both sides

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Solving equations with letters on both sides

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Solving equations with letters on both sides - Corbettmaths

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The Corbettmaths Practice Questions on the Use of a Calculator

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The Corbettmaths Practice Questions on Translations

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The Corbettmaths Practice Questions on Rotations

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Converting measurements of length, area, volume, mass and time from one unit to another.

This is level 1; Length. You can earn a trophy if you get at least 9 correct and you do this activity online.

© Transum Mathematics 1997-2023
Scan the QR code below to visit the online version of this activity.

https://Transum.org/go/?Num=520

Common Units

Length

Unit

Relationship

kilometre (km)

1 km = 1000 m

metre (m)

centimetre (cm)

100 cm = 1 m

millimetre (mm)

1000 mm = 1 m

Examples

To convert kilometres to metres multiply by 1000

To convert metres to centimetres multiply by 100

To convert centimetres to millimetres multiply by 10

To convert millimetres to centimetres divide by 10

To convert centimetres to metres divide by 100

To convert metres to kilometres divide by 1000

To convert kilometres to millimetres:

multiply by 1000 to convert the kilometres to metres

multiply by 100 to convert the metres to centimetres

multiply by 10 to convert the centimetres to millimetres

.. or multiply the number of kilometres by one million which is the previous multiplication factors multiplied together.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

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Converting measurements of length, area, volume, mass and time from one unit to another.

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How to Find the Area of a Rectangle | Math with Mr. J

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How to Find the Area of a Triangle | Calculate the Area of a Triangle

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Finding the Perimeter and Area of a Composite Shape | L-Shaped Example | Geometry | Math with Mr. J

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Finding side of a square when given area of square

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Finding side of a square when given area of square

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Finding the Side of a Square given the Area

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The Corbettmaths Practice Questions on Area on a Grid

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Converting between fractions, decimals and percentages

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Converting between fractions, decimals and percentages

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Converting Between Fractions, Decimals, and Percentages

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Corbettmaths

Videos, worksheets, 5-a-day and much more

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The Corbettmaths Practice Questions on Reverse Percentages

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Adding, subtracting, multiplying and dividing negative numbers

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Adding, subtracting, multiplying and dividing negative numbers

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How to Add, Subtract, Multiply, and Divide Integers | A Review of Integers | Math with Mr. J

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Use negative numbers in basic arithmetic and algebraic calculations.

This is level 1: simple subtraction You can earn a trophy if you get at least 9 correct and you do this activity online.

© Transum Mathematics 1997-2025
Scan the QR code below to visit the online version of this activity.

https://www.Transum.org/go/?Num=62

Description of Levels

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Level 1 - Simple subtraction

Example: 5 - 12

Level 2 - Adding to a negative number

Example: -7 + 9

Level 3 - Addition and Subtraction

Example: -10 + -2

Level 4 - Multiplication

Example: -3 x 2

Level 5 - Division

Example: -10 ÷ 5

Level 6 - Substitution

Example: If a=-3 and b=-7 evaluate 7a - 8b - 6

Level 7 - Mixed

Example: A mixed set of word problems

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don't yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Curriculum Reference

Help Video

Adding and Subtracting Negative Numbers

As shown in the video, a number line is a really useful resource to help calculating sums and differences. Click on the image below for an interactive number line:

Multiplying and Dividing Negative Numbers

When multiplying or dividing negative numbers remember this:

Same Signs \( \rightarrow \) Positive Answer

Different Signs \( \rightarrow \) Negative Answer

Example 1: Same signs (a positive multiplied by a positive) gives a positive answer:

\( 12 \times 6 = 72 \)

Example 2: Different signs (a positive multiplied by a negative) gives a negative answer:

\( 12 \times (-6) = -72 \)

Example 3: Different signs (a negative divided by a positive) gives a negative answer:

\( (-12) \div 6 = -2 \)

Example 4: Same signs (a negative divided by a negative) gives a positive answer:

\( (-12) \div (-6) = 2 \)

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don't yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Use negative numbers in basic arithmetic and algebraic calculations.

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The Corbettmaths Practice Questions and Answers on Nets