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To solve this problem, we'll follow this straightforward step:
Step 1: Recognize and apply the division rule involving the number 1.
Now, let's work through this step:
Step 1: Consider the expression . According to the division property, any number divided by 1 is the number itself. Therefore:
Hence, the solution to the problem is that .
Therefore, the correct choice is 7, which matches choice 3.
7
\( 20:1= \)
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