Approximation and Errors

Hong Kong

Stage 1 - Stage 3

By leading figure estimation, approximate the value of $2692+3669$2692+3669

Easy

Less than a minute

By leading figure estimation, approximate the value of $3620-1082$3620−1082

By leading figure estimation, approximate the value of $6534+7418+1240$6534+7418+1240

By leading figure estimation, approximate the value of $446\times54$446×54

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