Estimate the difference. Round each number to the nearest whole number, then subtract. $\newline$ 20 \frac{13}{18} $–$ 17 \frac{3}{4} $\newline$ The difference is approximately $\underline{\hspace{3em}}$ .

Full solution

Q. Estimate the difference. Round each number to the nearest whole number, then subtract.

\newline

20 \frac{13}{18}

–

17 \frac{3}{4}

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The difference is approximately

\underline{\hspace{3em}}

Round to Nearest Whole Number: Step $1$ : Round $20\frac{13}{18}$ to the nearest whole number. $\newline$ $20\frac{13}{18}$ is closer to $21$ than to $20$ because $\frac{13}{18}$ is more than half. $\newline$ Rounded value = $21$
Subtract Rounded Values: Step $2$ : Round $17 \frac{3}{4}$ to the nearest whole number. $\newline$ $17 \frac{3}{4}$ is closer to $18$ than to $17$ because $\frac{3}{4}$ is more than half. $\newline$ Rounded value = $18$
Calculate Difference: Step $3$ : Subtract the rounded values. $\newline$ $21 - 18 = 3$ $\newline$ Difference = $3$