4) Brennan got on a train and rode for 87.18 miles. Then he switched to a different train and rode for 68.9 miles. How far did Brennan ride in all? 4) \( \square \) miles

To find out how far Brennan rode in total, we need to add the distances he rode on both trains. 1. **Distance on the first train:** 87.18 miles 2. **Distance on the second train:** 68.9 miles Now, we will perform the addition: \[ \text{Total Distance} = 87.18 + 68.9 \] Let's calculate this step by step: 1. Align the numbers for addition: \[ \begin{array}{r} 87.18 \\ + 68.90 \\ \hline \end{array} \] 2. Add the numbers: - Start from the rightmost digit (hundredths place): \(8 + 0 = 8\) - Next, the tenths place: \(1 + 9 = 10\) (write down 0 and carry over 1) - Next, the units place: \(7 + 8 + 1 = 16\) (write down 6 and carry over 1) - Finally, the tens place: \(8 + 6 + 1 = 15\) Putting it all together, we get: \[ \text{Total Distance} = 156.08 \text{ miles} \] Thus, Brennan rode a total of \( \boxed{156.08} \) miles.