Estimating a tip without a calculator Estimate a $$ 15 \% $$ tip on a dinner bill of $$ \$ 68.11 $$ by first rounding the bill amount to the nearest ten dollars. Estimated tip: $$ \$ \square $$

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To estimate a $$ 15\% $$ tip on a dinner bill of $$ \$ 68.11 $$, we can follow these steps:

1. **Round the bill amount**: The bill amount is $$ \$ 68.11 $$. Rounding this to the nearest ten dollars gives us $$ \$ 70 $$.

2. **Calculate $$ 15\% $$ of the rounded amount**: To find $$ 15\% $$ of $$ \$ 70 $$, we can break it down as follows:
   - First, find $$ 10\% $$ of $$ \$ 70 $$:
     $$
     10\% \text{ of } 70 = \frac{70}{10} = 7
     $$
   - Next, find $$ 5\% $$ of $$ \$ 70 $$:
     $$
     5\% \text{ of } 70 = \frac{70}{20} = 3.5
     $$
   - Now, add $$ 10\% $$ and $$ 5\% $$ to get $$ 15\% $$:
     $$
     15\% \text{ of } 70 = 7 + 3.5 = 10.5
     $$

3. **Final estimated tip**: Therefore, the estimated tip is approximately $$ \$ 10.50 $$.

So, the estimated tip is $$ \$ \square 10.50 $$.
The estimated tip is \$10.50.

Estimating a tip without a calculator Estimate a \( 15 \% \) tip on a dinner bill of \( \$ 68.11 \) by first rounding the bill amount to the nearest ten dollars. Estimated tip: \( \$ \square \)

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