Arithmetic

In order to avoid silly mistakes
As a math idiot
I want to be able to perform arithmetic on the calculator

When $a \ne 0$, there are two solutions to $(ax^2 + bx + c = 0)$ and they are $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

  • Tags: @arithmetic, @fast

    Add two numbers

    $50 + 70 = 120$

    • # In the DHTML version, the description will be rendered with mathematical formulas if the experimental features are enabled. Given I have entered 50 into the calculator
    • And I have entered 70 into the calculator
    • When I press add
    • Then the result should be 120 on the screen
  • Tags: @arithmetic, @fast

    Subtract two numbers

    • Given I have entered 50 into the calculator
    • And I have entered 70 into the calculator
    • When I press subtract
    • Then the result should be -20 on the screen
  • Tags: @arithmetic, @fast

    Multiply two numbers

    • Given I have entered 50 into the calculator
    • And I have entered 70 into the calculator
    • When I press multiply
    • Then the result should be 3500 on the screen
  • Tags: @arithmetic, @fast

    Divide two numbers

    • Given I have entered 50 into the calculator
    • And I have entered 2 into the calculator
    • When I press divide
    • Then the result should be 25 on the screen