达到 / 高达 / 低至【dádào / gāodá / dīzhì】

达到 says a quantity or a standard has been reached. It takes a number, or a noun of level: 水平, 标准, 要求, 目的, 目标.

In headlines and tight writing 达 alone does the same job: 全长达八公里.

高达, 多达, 长达: a figure worth noticing

高达 puts weight on a number the writer finds high, "as high as", "as much as". 多达 does the same for a count of people or things, 长达 for a length of time. They take a number only, with no 了.

低至: strikingly low

低至 marks a figure as remarkably low, and it is a fixture of advertising: 低至五折 "as little as half price".

Mistakes

达到 is not 到达, which is arriving at a place. A dream or a plan is 实现, "realised", rather than reached.

• × 我们达到了北京 → 我们到达了北京
• × 达到我的梦想 → 实现我的梦想
• × 价格高达了一千元 → 价格高达一千元