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- Decimals
- Place value
- Comparing and ordering decimals
- Rounding to a place
- Significant figures
- Standard form and engineering notation
- Adding decimals
- Subtracting decimals
- Multiplying decimals
- Dividing decimals
- Converting decimals to fractions
- Converting decimals to percents
- Converting between decimals, fractions and percents
- Ordering decimals, fractions and percents

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- Understanding fractions
- Simplifying (reducing) fractions
- Equivalent fractions
- Comparing fractions
- Ordering fractions
- Mixed numbers and improper fractions
- Adding fractions
- Subtracting fractions
- Adding and subtracting mixed numbers
- Multiplying fractions
- Dividing fractions
- Multiplying and dividing mixed numbers
- Converting fractions to decimals
- Converting fractions to percents
- Converting between fractions, decimals and percents
- Ordering fractions, decimals and percents

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In this module, you can study how to write very large and very small decimal numbers in standard form and engineering notation, which are formats that make very large and very small numbers easier to work with.

Standard form (also called "scientific notation") is used by scientists when working with large and small numbers. Engineers use "engineering notation", which is similar to standard form.

The video above shows you how to convert a number to standard form (scientific notation).

If a number in standard form has a negative exponent, the number is less than one.

- Study "index notation" and powers of ten (Do this first)Read about using powers of ten to rewrite numbers. When you're done reading, you can try a self-quiz to check your understanding.
- Study standard form and engineering notation (Do this second)Study the concepts of standard form and engineering notation at mathsisfun.com. When you're done you can take a quiz to check your understanding. Just be aware that this site uses the term "scientific notation" where we use "standard form".
- Read about engineering notationRead about how to write a number using engineering notation at purplemath.com. Note: this site refers to standard form as "scientific notation".
- Download a standard form worksheetDesign and print a worksheet for practicing converting numbers to standard form. Please be aware that the term used on this worksheet are different than the ones used in NZ. Their "scientific notation" is our "standard form".

Use these search terms to find additional resources:

*standard formscientific notationengineering notation*

One odd little thing about our term "standard form" is that it refers to exactly the opposite thing in some other countries. You'll need to be aware of this to make sense of web pages from some other countries (such as the US).