Basic Math: Rounding Off, Adding and Subtracting Numbers, Online Calculators

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Three online calculators available: [+] Adding numbers [+] Subtracting numbers [+] Rounding off numbers

Calculations are followed by detailed step-by-step explanations:

• The calculators that are running these mathematical operations are free and all the calculations performed by the visitors are listed, followed by step-by-step explanations.
• These detailed explanations that follow all the calculations run by our visitors can be used as an instrument of learning by seeing, making the calculators that are listed below not just an instrument of getting the result, or validating a result, but a valuable resource to teach yourself some basic math skills.

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1. Adding and subtracting natural numbers, 2 available calculators:

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• 1.1. Adding multiple digit numbers, online calculator

  Calculate the sum and learn how to add multiple digit numbers using the column adding method, from right to left (carrying over if the case).

• The latest 5 operations with added numbers:

  How to add numbers: 19 + 17 + 25?	May 07 23:28 UTC (GMT)
  How to add numbers: 9,164 + 5,900?	Apr 25 11:17 UTC (GMT)
  How to add numbers: 1,046 + 9,387 + 2,145?	Apr 24 15:23 UTC (GMT)
  How to add numbers: 1,046 + 9,387 + 2,145?	Apr 24 15:23 UTC (GMT)
  How to add numbers: 1,046 + 9,387 + 2,145?	Apr 24 15:23 UTC (GMT)
  All the operations with the numbers added by users...

• How to add two numbers? 1. Stack the numbers on top of each other. 2. Add their digits column by column starting from the columns on the right. If the result of a two digit addition is more than 9, carry over the excess bit of 1 to the next left column.

• 1.2. Subtracting multi digit whole numbers, online calculator

  Calculate the difference and learn how to subtract multiple digit numbers using the column subtracting method, from right to left (borrowing from the higher place value column if the case).

• The latest 5 operations with subtracted numbers:

  How to subtract numbers: 476 - 422 - 532 + 428 + 979?	Apr 24 18:28 UTC (GMT)
  How to subtract numbers: 476 - 422 - 532 + 428 + 979 + 39?	Apr 24 18:28 UTC (GMT)
  How to subtract numbers: 476 - 422 - 532 + 428 + 979?	Apr 24 18:28 UTC (GMT)
  How to subtract numbers: 476 - 422 - 532 + 428 + 979?	Apr 20 10:47 UTC (GMT)
  How to subtract numbers: 476 - 422 - 532 + 428 + 979?	Apr 20 10:47 UTC (GMT)
  All the operations with the numbers subtracted by users...

• How to subtract two numbers? 1. Stack the numbers on top of each other. 2. Subtract column by column starting from the column on the right. If the second digit is larger than the first borrow 10 from the next column to the left.

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2. Rounding off numbers, 1 available calculator:

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• 2.1. Rounding off numbers to whole or decimal places, online calculator

  Rounding off positive and negative numbers to whole or decimal places: half up, half down, half away from zero, half towards zero, half to even, half to odd, to ceiling, to floor.

• The latest 5 operations with rounded numbers:

  Round off 83.825 to the nearest hundredth (2 decimal places)	May 07 23:44 UTC (GMT)
  Round off 83.8274 to the nearest hundredth (2 decimal places)	May 07 23:32 UTC (GMT)
  Round off 8,930 to the nearest thousand (4 whole places)	May 07 23:27 UTC (GMT)
  Round off 8,930 to the nearest thousand (4 whole places)	May 07 23:27 UTC (GMT)
  Round off 1,953 to the nearest hundred (3 whole places)	May 07 23:24 UTC (GMT)
  All the operations with the numbers rounded off by users...

• Rounding a number means replacing it by another value that is a simpler, shorter approximation, while keeping its value close to the initial one. The rounded number will be less accurate, but easier to work with.

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