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Student Question

Grade 4 • 2yr.


I am having trouble adding and subtracting a decimal number ...

Can you help me?


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Explanations (1)

  • Explanation from Alloprof

    Explanation from Alloprof

    This Explanation was submitted by a member of the Alloprof team.

    Team Alloprof • 2yr.

    Good evening, thank you for your question!

    The addition and the  subtraction of decimals are done exactly the same way as when we are in the presence of whole numbers. The important thing is to align the commas contained in each of the numbers.

    For example, let's add the following decimal numbers: 532.2 and 12.245.

    We start by correctly placing the numbers. It can be useful to add zeros if necessary:


    Then, we add one position at a time starting from the right:


    I invite you to visit these pages of our website to complete my explanation regarding addition and subtraction of decimal numbers:

    I hope I answered your question. Let us know if we can help you with anything else! :)

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