The most important math I think will be useful in life is addition, subtraction, multiplication, and division. Why? Because when you buy something, someone purchases it you have to know how to count, because if you don't you might get into trouble. That is mostly important to cashiers at stores and stuff.
Another important math we might need is Decimals to fractions because, it's like getting a price off. You have to know your discounts when you get older so you know whether you need more amount of money or less so you can save things up when your older.
When you go to the bank, some people don't know how to save their money so you can use math to know how much money you have in your bank, so you won't use it all. Because y mom does that, we have a lot of money but still, the more money the better. 

Some people use fractions to figure out things, like for example how much people ate a pizza and how much is left to eat with out looking at the pizza. You can also turn it into a fraction which tells how many percents have it, you can turn a fraction to a decimal, from a decimal to a fraction. It's very simple.



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