This week I learned about scientific notation. Scientific notation is used when writing big numbers or small numbers. These numbers usually take to long t0 write down, so a formula is used to make it easier. This formula is a number multiplied by 10 to the power of how many zeros you want to add. If your number is a decimal, then you can use a negative exponent to find how many zeros you need. When writing scientific notation, you have to remember to keep your number with only one digit in the ones place and the rest in the decimal spot. If you are trying to find the distance to the moon, It would be 384,400 Km. But in scientific notation, it would be 3.844 times 10 to the power of 2.