why is 5+1*10=15

1 times 10 is 10, add 5 is 15.

Therefore: 1*10 = 10

10+5 = 15

You should have typed it like so... 10(1+5) if you are trying to get 60 as a result

It has to do with PEMDAS

Perenthesis

Exponent

Multiplication and Division

Addition and Subtraction