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18 January, 18:12

Theo solved n + 5 = 11 for the unknown. The steps he

took are shown.

He started with 5 tiles.

Then he added tiles as he counted up to 11.

He realized he added 6 more tiles to his original 5 to make

11. So he found the unknown to be 6.

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Answers (1)
  1. 18 January, 18:14
    0
    what is the question?
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