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Cambridge IGCSE 0580
Round to decimal places and significant figures, and estimate by rounding to 1 significant figure.
Round to 3 decimal places. If the next digit is 5 or more, round up.
Round to 4 significant figures. If the next digit is 5 or more, round up.
Round to 2 decimal places. If the next digit is 5 or more, round up.
Round to 3 significant figures. If the next digit is 5 or more, round up.
Round to 2 decimal places. If the next digit is 5 or more, round up.
Round to 3 decimal places. If the next digit is 5 or more, round up.
Rounding, Standard
Find the digit you are keeping, then look at the digit after it: 5 or more rounds up, 4 or less leaves it. Count significant figures from the first non-zero digit, and keep any trailing zeros that show the accuracy.
Learn the method