What is the vocab word for easy to divide mentally?

There isn't a single perfect vocabulary word that captures the idea of being "easy to divide mentally". However, here are some options that come close, depending on the specific context:

General terms:

* Divisible: This means capable of being divided evenly, but doesn't necessarily imply ease.

* Tractable: This word suggests something that is easily managed or dealt with, which could apply to mental division.

* Amenable: Similar to tractable, this suggests something readily yielding to division.

More specific terms:

* Facile: This implies something easily done or achieved, and could be used to describe mental division.

* Effortless: This emphasizes the lack of effort involved in mental division.

* Simple: This implies straightforwardness and lack of complexity, making mental division easier.

Example:

* "The number 100 is highly divisible by many numbers, making it easy to work with mentally."

Ultimately, the best word to use will depend on the specific context and the nuance you want to convey.