Step 1: Multiplying
Okay you have ten seconds no googling or using a calculator
If you can't get it here's how to do it.
Divide the number by two.
Now multiply by ten.
Easier right? It's okay if you don't get it at first it might take some practice especially with numbers that can't be evenly split.
Step 2: Dividing
First double them.
Next divide by ten.
See this is something you can do with only your brain power!
Step 3: Base Ten
Thanks for reading I hope to add more tutorials soon to find them look here: