The expression "18 × 1 1/2" represents the multiplication of 18 by the mixed number 1 1/2.

To solve this:

1. Convert the mixed number to an improper fraction:
   \[
   1 \frac{1}{2} = \frac{3}{2}
   \]

2. Multiply 18 by the improper fraction:
   \[
   18 \times \frac{3}{2} = \frac{18 \times 3}{2} = \frac{54}{2} = 27
   \]

So, \(18 \times 1 \frac{1}{2} = 27\).

Would you like further details on how I performed the conversion and multiplication?

### Related Questions:
1. What are mixed numbers, and how do you convert them to improper fractions?
2. How do you multiply a whole number by a fraction?
3. How do you simplify fractions after multiplication?
4. What other methods can be used to handle mixed numbers?
5. How does multiplication work with mixed numbers and decimals?

### Tip:
When multiplying by a mixed number, always convert it to an improper fraction first to simplify the process.

Learn how to multiply 18 by the mixed number 1 1/2 using fractions. This guide provides a detailed solution, including converting mixed numbers to improper fractions and multiplying with fractions. Ideal for students in Grades 5-6.

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