Tuesday 27 September 2016

Simple subtraction?

This subtraction calculation has four missing digits. It looks like it might be simple, but I'm not sure if it is...



Can you work out which digits can replace the question marks?

Is there more than one answer? How can you be sure?

22 comments:

  1. I think the answer is 1111
    - 011
    =1100

    ReplyDelete
    Replies
    1. But the difference needs to only have three digits! Good try though.

      Delete

  2. 1111-011=1111

    ReplyDelete
  3. 1119-011=1118`

    ReplyDelete
  4. Ise and Fernanda 6 Blue4:34 pm, October 03, 2016

    1110
    -911
    ____
    0199

    ReplyDelete
    Replies
    1. Super work! This was really tricky but you got there in the end. I was very impressed with the way you worked together, bouncing ideas off each other. Great teamwork!

      Delete
  5. 1124-9801=2022

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    Replies
    1. I'm not sure what you've done here Daniel. Have a look at the calculation again and see what digits (numbers) you can put in place of each ? to make it work.

      Delete
  6. 4185-8051=1401

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  7. Replies
    1. 1110-211 is 899 so that doesn't quite work... But I think you might be on the right lines.

      Delete
  8. 1 plus 0 is 1 so the anser is 000

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    Replies
    1. Read the question again Sami. We're looking for numbers that you can use to replace each ? to make the calculation work.

      But it is Year 6 work so don't worry if you're not sure!

      Delete
  9. 110
    -911
    _______
    0199

    ReplyDelete
    Replies
    1. You clearly understand how to do this Christyana but you've made a small mistake which means it doesn't work. Can you spot it?

      Also, don't forget to use a capital letter for your name and say which class you are in.

      Delete
  10. The real answer for this question is 1110-911=199.

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  11. I think the answer is

    1110
    -911
    199

    ReplyDelete
  12. The answer is 1110 minus 911 that makes 199

    ReplyDelete