The result of rounding 0.62387 to 0.00 1 is (0.624), and the number that is approximately one tenth is (0.6).

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Compare the size of 2a and -2a, and write the process.

When a>0, 2a & gt-2a

When a=0, 2a=-2a.

When a<0, 2a

I hope I can help you!