Rounding Big NumbersRounding to any place, and why estimating first catches wrong…4th GradeThe rule never changes — only which digit you underline.1UNDERLINE THE ROUNDING PLACETo the nearest thousand? Underline the thousands digit.2LOOK AT THE DIGIT TO ITS RIGHTThat one digit decides. Everything further right is irrelevant.35 OR MORE ROUNDS UP4 or less leaves the underlined digit alone.4ZERO EVERYTHING TO THE RIGHTThe rounded place keeps its value; the rest becomes zeros.WORKED4,682 to nearest thousand → 5,000 (6 rounds up)4,682 to nearest hundred → 4,700 (8 rounds up)4,682 to nearest ten → 4,680 (2 rounds down)Estimate 4,682 + 3,219 as 5,000 + 3,000 = 8,000. If your answer is800 or 80,000, check again.Rounding Big Numberswww.littleactivity.com

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Math · 4th Grade

Rounding Big Numbers

Rounding to any place, and why estimating first catches wrong answers.

How to use it

Estimate before calculating. If the real answer is nowhere near, something went wrong.

Free · print-ready PDF · US Letter and A4

Grade
4th Grade
Ages
9–10
Subject
Math
Pages
1

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