Common mistake Missing space between numeric value and unit (e.g., 25 km)
Common Mistake: Missing Space Between Numeric Value and Unit
One common mistake in English writing is the omission of a space between a numeric value and its accompanying unit. This is particularly common when expressing measurements, such as distances or temperatures.
Why is this important?
Adding a space between the numerical value and the unit symbol is important for clarity and consistency in writing. It allows readers to easily understand the value being presented and avoids confusion or ambiguity.
Examples
 Incorrect: She ran 5km today.
 Correct: She ran 5 km today.
 Incorrect: The temperature is 30°C.
 Correct: The temperature is 30 °C.
In the incorrect examples above, the space between the numeric value and the unit symbol is missing. This can make the sentences difficult to read and understand. However, by adding the space, as shown in the correct examples, the meaning becomes clear and the writing is more accurate.
Exceptions
There are a few exceptions when it comes to adding spaces between numeric values and unit symbols. For example, unit symbols for degree, minute, and second for plane angle do not require a space.
Incorrect: The angle is 90°.
Correct: The angle is 90°.
In this case, no space is left between the numerical value and the unit symbol. This is the generally accepted format for representing angles.
Using Linguix Grammar Checker
To avoid common mistakes like missing spaces between numeric values and unit symbols, you can use the Linguix grammar checker. This powerful tool helps to correct grammar, spelling, and punctuation errors, ensuring your writing is clear and errorfree.
Missing space between numeric value and unit (e.g., 25 km) mistake examples

Incorrect:The temperature is 25°C.Correct:The temperature is 25\u0026nbsp;°C.

Incorrect:The temperature is 25°C.Correct:The temperature is 25\u0026nbsp;°C.

Incorrect:The temperature is 25,5°F warm.Correct:The temperature is 25,5\u0026nbsp;°F warm.

Incorrect:Distance 5km.Correct:Distance 5\u0026nbsp;km.

Incorrect:It weighs 5kg.Correct:It weighs 5\u0026nbsp;kg.

Correct:...rest in the estate to the Disney Corporation for $350m.

Correct:The revenue was $2.7m

Correct:The German news magazine T3N is popular.

Correct:(AsCH3)2n

Correct:They have 100m users

Correct:Fits 1.5mm4.5mm

Correct:https://docs.google.com/document/d/1hEO7G3hm6bTkYnNlmT3uV

Correct:https://docs.google.com/spreadsheets/d/122B2q3m6s7aoXXPlmDk3p3h_nTIFO1E7VaTJt

Correct:..., one of which included irradiation of 243Am with 15N ions.

Correct:... astatine214, astatine215, and astatine216m.

Correct:...their sample variance, and σ2N their population variance.

Correct:Globally, it has 690m MAUs (all outside China), meaning the US is actually a small percentage of users.

Correct:Meanwhile, the BBC understands the government has “stood down” its Operation Yellowhammer contingency planning for a nodeal exit, while it has also paused its £100m Get Ready for Brexit on 31 October campaign.

Incorrect:The angle is 25 ° C.Correct:The angle is 25\u0026nbsp;°C.

Correct:The temperature is 25 °C.

Incorrect:The angle is 25 °.Correct:The angle is 25°25 °C.

Correct:The temperature is 25 °C.

Correct:3° 14′ 45,54″

Incorrect:45,54 ″Correct:45,54″

Correct:It is denoted by a double prime ( ″ ).