Math
Rounding Too Early in Multi-Step Calculations
Students round each intermediate number before finishing the calculation, so the final answer changes.
Quick check
Why students make it
Rounding feels like cleaning up the work, so students think it cannot affect much. Each small rounding error can grow when the calculation has several steps.
The rule done right
Keep exact values, fractions, or several extra decimal places until the final step. Round only the final answer to the place value the problem asks for.
Related resources
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