2.4.2 Self-Check on Rounding

Tick symbolExercise 3: Rounding Decimal Numbers

Round each number to the specified placeholder:

(a) 456.28377 to the nearest thousandth.

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Answer

(a) 456.284 (7 in the ten thousandths place indicates we round up).

(b) 2885 to the nearest hundred.

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Answer

(b) 2900 (8 in the tens place indicates we round up).

(c) 43.653 to the nearest unit.

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Answer

(c) 44 (6 in the tenths place indicates we round up).

(d) 752.245 to the nearest tenth.

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Answer

(d) 752.2 (the 4 in the hundredths place indicates we leave the digit in the tenths place unchanged).

(e) 10.995 to 1 decimal place.

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Answer

(e) 11.0 (the 9 in the second decimal place indicates that we round up 9 to 10).

(f) 15.5435 to 3 decimal places.

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Answer

(f) 15.544 (the 5 in the fourth decimal place indicates that we up to 3 to 4).

(g) There is an advert in your local newspaper for a used car. The advertised price is $10,649.  Estimate the price to the nearest $100 and $1000.

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Answer

$10,600 (to the nearest $100).

$11,000 (to the nearest $1000).

2.4.1 Self-Check on Using a Number Line

2.5 Quiz Time