值得 / 值
Similarities
Both can say that something has value — that it is worth the time, effort or money.
这个调查对今后的工作很有用，花再多时间也值得
这个调查对今后的工作很有用，花再多时间也值
Either word works in this sentence.
1. 值得 is a verb, 值 an adjective
值得 + Verb
别生气了，咱们不值得为这么点儿小事生气
为这么点儿小事生气，一点儿也不值
值得 takes a verb or a short clause after it.
值 here is an adjective and usually stands alone.
2. Both can be verbs, with different meanings
这个沙发价钱不贵，质量又好，值得买
这个手机值五千块
| 值得 | 值 |
|---|---|
| A verb | An adjective or a verb |
| A verb follows | A price follows, or nothing at all |
| Rates the value of an action | Rates the price of a thing |
Remember:
值得 + Verb = worth doing.
值 + Money = is worth that amount.