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It seems like a complicated exercise. If I am not mistaken, the goal is to replace the symbol with something that makes it work. In this case, we might be able to replace it with \(\times0\).
$$ 1\cdot\circ\cdot1=0.1 $$
$$ 1\times0.1=0.1 $$
However, we cannot prove it without additional examples.
I hope this helps, and if you have any further questions, feel free to ask.
Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hi !
It seems like a complicated exercise. If I am not mistaken, the goal is to replace the symbol with something that makes it work. In this case, we might be able to replace it with \(\times0\).
$$ 1\cdot\circ\cdot1=0.1 $$
$$ 1\times0.1=0.1 $$
However, we cannot prove it without additional examples.
I hope this helps, and if you have any further questions, feel free to ask.
Have a nice day !