Rounding & EstimationATI TEAS 7 cheat sheet

Find the place, look right

10 key facts Reviewed Oct 2026

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The Rule

Find the place value you are rounding to
Look at the digit immediately to its right
5 or more rounds up; 4 or less rounds down
Digits to the right become zeros or drop

Examples

347 to the nearest ten → 350
2.364 to the hundredth → 2.36
0.0518 to the thousandth → 0.052

Estimation

Round each number first, then compute — fast sanity check
Use it to eliminate answer choices before doing exact work

Caution

Round once, at the end — rounding mid-problem compounds error

Key takeaway

Find the place, look right

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