Ainehulga suhtelise osa 3 mmol/mol korral on suuruse väärtusarv 3 ja mõõtühik mmol/mol. Mõõtühik mmol/mol on arvuliselt võrdne 0,001, kuid see arv ei ole osa suuruse väärtusarvust, mis on pidevalt 3. Suuruse väärtuse 5,7 kg korral on suuruse väärtusarv {m} = (5,7 kg)/kg = 5,7. Sama suuruse väärtuse saab avaldada kujul 5 700 g ja sel juhul on suuruse väärtusarv {m} = (5 700 g)/g = 5 700.
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Üksühikuga suuruste korral on tugiviiteks mõõtühik − arv üks, aga seda ei käsitleta suuruse väärtusarvu osana. Suuruste korral, millel on mõõtühik, st suuruste korral, mis ei ole ordinaalsuurused, avaldatakse suuruse Q väärtusarv {Q} sageli kujul {Q} = Q/[Q], kus [Q] tähistab mõõtühikut.
In an amount-of-substance fraction equal to 3 mmol/mol, the numerical quantity value is 3 and the unit is mmol/mol. The unit mmol/mol is numerically equal to 0,001, but this number 0,001 is not part of the numerical quantity value, which remains 3. For a quantity value of 5,7 kg, the numerical quantity value is {m} = (5,7 kg)/kg = 5,7. The same quantity value can be expressed as 5 700 g in which case the numerical quantity value {m} = (5 700 g)/g = 5 700.
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For quantities with unit one, the reference is a measurement unit which is a number and this is not considered as a part of the numerical quantity value. For quantities that have a measurement unit (i.e. those other than ordinal quantities), the numerical value {Q} of a quantity Q is frequently denoted {Q} = Q/[Q], where [Q] denotes the measurement unit.
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