645 Rounded to the Nearest Ten

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What is 645 rounded to the nearest ten?

Answer

645 rounded to the nearest ten is
650

Nearest ten — the ones digit decides: 5⁠–⁠9 round up, 0⁠–⁠4 keep; digits to the right become 0.

Exactly halfway between 640 and 650 — equally close to both. The halfway rule rounds away from zero, as in school and Excel ROUND: 650. Round half to even (banker's rounding) gives 640.

645

4 tens place 5 The ones digit decides

645
640 650halfway → away from zero

midpoint 645

5 with only zeros after it → halfway, away from zero: 650

645 rounded to every place
PlaceRounded
to the nearest thousandth645.000
to the nearest hundredth645.00
to the nearest tenth645.0
to the nearest whole number645
to the nearest ten650
to the nearest hundred600
to the nearest thousand1,000

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Recalculate with different values ↑

Numbers rounded to the nearest ten

NumberRounded
614610
615620
617620
623620
625630
629630
630630
634630
635640
637640
638640
640640
642640
643640
644640
645650
646650
648650
650650
652650
654650
655660
658660
663660
665.3670
671670
673670
675680
676680
678680

FAQ

What is 645 rounded to the nearest ten?

645 rounded to the nearest ten is 650

Is 645 closer to 640 or 650?

Equally close — 5 from each. The halfway rule rounds away from zero, to 650; round half to even (banker's rounding) gives 640.

How many zeros does rounding to the nearest ten leave at the end?

At least 1: every digit right of the tens place becomes 0 and the decimals are dropped — 645 → 650.

See Also