valuable
valuable, valued
No valuable is an adjective.
The participles of the verb, valuing and valued, can be adjectives. The derivative adjective is valuable.
It is computed, as in "the computed value".
monetary The necklace has no monetary value.
No, "useless" is not a comparative adjective. It is a simple adjective used to describe something that has no use or value.
"Important" is primarily an adjective, which describes the significance or value of something. However, it can also be used as a verb in contexts where it means to give special value or significance to something.
An equal adjective is an adjective that describes things that are the same or equivalent in some way. For example, "equal" itself is an equal adjective as it signifies things that are identical in value or quantity.
It is an adjective (having great value or utility). The adverb form is importantly.
monetary The necklace has no monetary value.
The number value hundred (one hundred, 100) is a cardinal number. The adjective form is hundredth, which can also represent a fractional value (one one-hundredth = 1/100).
Score is a noun for a value (game, credit, etc) and a verb to mean cut with a line or lines. It is an archaic number value (20) that is not used as an adjective. As a noun adjunct, it appears with nouns (e.g. score table), but the related adjective is "scored."