KS3 Decimals & Rounding
KS3
Free lesson
Number
Decimals
Rounding Decimals to Decimal Places — KS3 Maths
A clear, step-by-step KS3 lesson on rounding decimals to 1, 2 and 3 decimal places. One reliable method, three worked examples, and the carry and trailing-zero traps that catch people out.
Rounding a decimal means writing it with fewer digits after the point while staying as close to the real value as we can. Keep the digits up to the place you are rounding to, then look at the very next digit: five or more rounds up, four or less it stays the same. This lesson works through three examples — including the case where a nine carries and you have to keep the trailing zeros, so 4.196 to two decimal places is 4.20, not 4.2.
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A free printable worksheet with 16 questions and a full worked answer key. No sign-up needed.