**In this module, you can ****study how to write very large and very small decimal numbers in standard form, 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. **

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

**Study and practice**

- 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. 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".

0.00 min addition (+), subtraction (-), multiply (x), divide (÷)

1.19 min decimal point

2.43 min C, CE and backspace

4.19 min square, square root & fractions

6.17 min percentage (%)