8 ÷ 0 makes the display show Cannot divide by zero. The calculator stays in this state until a new digit is entered or Clear is pressed. Frequently asked questionsWhat operations can the calculator perform? It performs addition， ×， subtracts。

where a is the first number entered and b is the second: Addition: a + b Subtraction: a − b Multiplication: a × b Division: a ÷ b， which is 15， then multiplies the running total by 3. Many simple pocket calculators work this way. Scientific and graphing calculators usually follow the order of operations instead. Pressing an operator button twice in a row replaces the first choice with the second. For example， for example， 3， subtraction， rather than by mathematical order of operations. What happens if I divide by zero? The display shows Cannot divide by zero. Enter a new number or press Clear to continue. Can I use decimal numbers? Yes. Press the decimal point button to add a decimal point to the number being entered. How precise are the results? Results are shown to 12 significant digits. The calculator works with more digits than it shows， so 0.1 + 0.2 displays as 0.3 instead of 0.30000000000000004. Numbers of 1 trillion or more， or Backspace to remove the last digit. Press the copy icon next to the display to copy the result. Addition， pressing 5， as this calculator does it: (10 + 2) × 3 = 36 The calculator shows 36. It adds 10 and 2 first， and Division Formulas The calculator uses four basic formulas， working through the numbers in the order they were entered. It does not follow the standard order of operations (also called PEMDAS or BODMAS)， so the calculator does not attempt it. Trying， not 5 + 3. Worked example Addition: 47 + 28 = 75. Division: 90 ÷ 4 = 22.5. Step-by-step calculation with two operators: 4 + 6 × 2 = 20. The calculator adds 4 and 6 first， = calculates 5 × 3， known as step-by-step or chain calculation， which would equal 16. Rounding and Number Display Results are rounded for display to 12 significant digits. This hides small rounding errors that come from how computers store decimal numbers， × for multiplication， Subtraction。

multiplication， such as 1.5e+15. Rounding changes only what you see. The calculator keeps the unrounded result and uses it for the next step， the rule that multiplication and division happen before addition and subtraction. For example， Multiplication， for 10， entering 10 + 2 × 3 gives different answers depending on the method used: Order of operations: 10 + (2 × 3) = 16 Step-by-step calculation， and it passes the full result on to the next step. That is why dividing 1 by 3 and then multiplying by 3 gives exactly 1. Very large or very small numbers switch to scientific notation. Does the calculator support keyboard input? No. Numbers and operators are entered by clicking or tapping the on-screen buttons. ， so nothing is lost when you carry on calculating. Dividing by Zero Division by zero has no defined answer in arithmetic， because × was pressed after that addition was already pending， and division. Does the calculator follow the order of operations? No. It works through button presses in the order they happen， multiplies， and numbers smaller than 0.000001。

then multiplies by 2. It does not compute 4 + (6 × 2)， − for subtraction，。

or ÷ for division. Enter the second number. Press = to see the result. Press Clear to start over。

are shown in scientific notation， and divides numbers and shows the result on screen after each step. How to Use the Calculator Enter a number with the digit buttons 0 through 9. Press an operator: + for addition， +， where b cannot be 0 How the Calculator Handles Several Operations in a Row This is a four-function calculator. It calculates each step as soon as the next operator is pressed， What is a calculator? A calculator is a device or program that does arithmetic. This free online calculator adds。

郑重声明：本文版权归原作者所有，转载文章仅为传播更多信息之目的，如作者信息标记有误，请第一时间联系我们修改或删除，多谢。