När man avrundar decimaltal till heltal tittar man på tiondelssiffrans värde (talet precis efter decimalen). Är tiondelssiffran 0,1,2,3 eller 4 behåller man entalssiffran som den står. Är tiondelssiffran 5,6,7,8 eller 9 avrundas entalssiffran uppåt.
Tal | Tiondelssiffra | ≈ |
---|---|---|
126.31 | 3 | 126 |
421.89 | 8 | 422 |
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