384 is between 380 and 390.
First you need to find out what tens 384 might fall under.
The number 384 is between 350 and 400.
The tens between 350 and 400 are:
384 is larger than 380 which is the nearest ten below it.
384 is however smaller than 390 which is the nearest ten above it.
384 is therefore between 380 and 390.
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