Substraction
*Substraction is something which we cut off.
such as if there are four balls and we have to substract two balls from it. It becomes two the remaining
Multiplication
*Multiplication is something which we multiply
such as if there are nine balls we have to multiply it from four it becomes thirty six
Division
division such a hard thing which we have to divide
such as if we take thirty nine divide by three. It becomes thirteen.
Addition
Addition is something we add
such as if we take two apples and then we add one apple to it.
It becomes three
use the above links to know how to do the sums