How To Use A Calculator With Pictures

If your calculator has an “ON” button, press it when the calculator is powered on to turn it off. Some calculators automatically turn off after remaining unused for a few minutes.

Add additional numbers to a series. For example, press “+” and “5” to add to the sum of “5 + 10. " When you need the final answer, press the “=” button to get the sum of “20. "

Subtract additional numbers from a series. For example, press “-” and “2” to subtract from the sum of “2 – 7” and then press “=” to get a final answer of “0. " Try subtracting numbers after adding them.

If you’re using a physical calculator, the division key is likely “÷. " For computer calculators, the division key is probably “/. " Divide in a series by pressing “÷” or “/” followed by a number. For example, if your calculator says “2 ÷ 1,” hit “÷,” “2,” and then “=” to get a final answer of “1. "

Physical calculators often use “x” as a multiplication key, while computer calculators typically use “. " Multiply in a series by pressing “x” or “” followed by a number. For example, if your calculator says “6 x 5,” press “x,” “2,” and then “=” to get a final answer of “60. "

Remember that you can change your equation without clearing everything after pressing “=” only with ←/→ key, so always double-check your numbers first!

The “AC” button stands for “All Clear. " If you hit “+,” “-,” “x,” or “/” after “4” and then try to start a new equation without first hitting “Clear,” it will become a part of the current equation. Always hit “Clear” when you need to restart from the middle of a calculation.

The “CE” button stands for “Clear Entry. " If you press “Clear” instead of “Backspace” or “Delete,” your equation will reset to “0. "

If you’re adding, subtracting, multiplying, or dividing after you create your decimal number, you don’t have to hit “=. " Use the “+,” “-,” “x,” and “÷” buttons to add, subtract, multiply, and divide decimals, respectively.

To turn a percentage back into a number, multiply it by 100. In the last example, you hit “7” and “%” to get 0. 07. Now, hit “x” and then “100” to multiply it by 100 and get the original number: “7. " You can also simply multiply the number by 0. x, replacing x for the desired percentage. For instance, to know what 15 percent of 40 is, multiply 40 by 0. 15.

Use the “+,” “-,” “x,” and “÷” buttons to add, subtract, multiply, and divide fractions respectively. Just don’t forget to put brackets around each fraction or the calculation will be off!

Temporary storage isn’t affected by the “Clear” or “Backspace” buttons. If you want to reset the calculator’s temporary memory, press “MC. " Use the temporary storage to make simple calculations in between more complicated ones.

Multiplying a number by its reciprocal is always equal to 1.

The second function of the square button is usually “√,” which is the square root. The square root is the value that turns the square (such as 4) into its root (in this case 2). For example, the square root of 4 is 2, so pressing “4” and then “√” gives you a final answer of “2. "

Any number (x) to the power of 2 is called x squared, while any number (x) to the power of 3 is called x cubed. The “^” key is most often found on graphing calculators while the “x^y” and “yX” keys are found on scientific calculators.

Don’t hit the multiply (x) button after hitting “EE” or “EXP. " Use the “+/-” button to change the sign of the exponent number.

To convert the sine into an angle, press the sine value and then hit “sin-1” or “arcsin. " If you want to turn an angle’s cosine or tangent into the angle value, press the cosine or tangent value and then press “cos-1” or “arccos. " If your calculator doesn’t have “arcsin,” “sin-1,” “arccos,” or “cos-1” buttons, hit the “function” or “shift” key and then press the standard “sin” or “cos” button to turn their values into angles.