So multiplying by 5 may seem easier than multiplying by 7 especially if you know the times tables but it's about to get a lot easier.
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Step 1: Multiplying
Here are three numbers multiply them by 5 as fast as you can
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
Here are three number you think I'm crazy there's no way you can divide these in your head right? Wrong!
First double them.
Next divide by ten.
See this is something you can do with only your brain power!
Step 3: Base Ten
The number ten is a powerful number multiplying and dividing by it are much easier use this to your advantage..
Thanks for reading I hope to add more tutorials soon to find them look here: