Lacey walks \( 1 \frac{1}{2} \) kilometers to school. Hsu walks 2 kilometers to school. How many meters do Lacey and Hsu walk in all?

Lacey walks \( 1 \frac{1}{2} \) kilometers, which is equivalent to \( 1,500 \) meters (since \( 1 \) kilometer = \( 1,000 \) meters). Hsu walks \( 2 \) kilometers, which is \( 2,000 \) meters. When you add these distances together, \( 1,500 + 2,000 \) gives you a total of \( 3,500 \) meters, so together they walk \( 3,500 \) meters to school. If you ever try converting kilometers to meters, remember that multiplying by \( 1,000 \) does the trick! And a common mistake is in the fraction part; ensure you convert mixed numbers properly first!