#PHP #PHP/operators/arithmetic operators Arithmetic operators in PHP include +, -, *, /, %, **. - $a Reverse the sign of $a. will print -10. $a + $b Add $a and $b. will output 14. $a - $b Subtract $b from $a. will output 6. $a * $b Multiply $a and $b. will print 40. $a / $b Divide $a by $b. will output 2.5. $a % $b The remainder of dividing $a by $b. $a = 10; $b = 4; echo $a % $b; ?> will output..