Can you split stacks of items?

Is it possible to split stacks of items from an initial stack?

Sometimes when I have multiple of an item, I'd like to figure out a base sell price by just offering 1 to Timmy (or Tommy?) and from there gauge what items are more effective to sell for.

Often times however I can't seem to find an option to split a stack of items from an initial stack. Sometimes I need to sell weeds for a Nook Miles challenge but also need to keep some weeds for crafting furniture items.

There doesn't seem to be way to easily split stacks into stacks of more than 1. However, it is pretty easy to take 1 item of your stack. Simply press A on a stack in your inventory, and choose "Grab 1". It will put the single item in an empty inventory space.

If you're looking to split a stack of 30 into two stacks of, say, 15 each, you're going to have to do it the way I described above. It's very tedious.

Finally, you can use a similar way to split items by dropping them on the ground and picking them up, one by one.