show how to multiply 18 by 0.2 with no calculator

To multiply 18 by 0.2 without a calculator, follow these steps:

1. **Rewrite 0.2 as a fraction**:
   \[
   0.2 = \frac{2}{10}
   \]

2. **Multiply 18 by the fraction**:
   \[
   18 \times \frac{2}{10} = \frac{18 \times 2}{10} = \frac{36}{10}
   \]

3. **Simplify the result**:
   \[
   \frac{36}{10} = 3.6
   \]

Thus, \(18 \times 0.2 = 3.6\).

Would you like further details or have any questions?

Here are 5 related questions to deepen your understanding:
1. How would you multiply 25 by 0.4 without a calculator?
2. How can you multiply a whole number by a decimal using estimation?
3. What is the process of multiplying a number by 0.5?
4. How does converting decimals to fractions simplify multiplication?
5. How can you multiply 7.5 by 0.3 by breaking down the numbers?

**Tip**: Always try to convert decimals to fractions when multiplying; this often makes the calculation easier.

Learn how to multiply 18 by 0.2 without a calculator by converting the decimal into a fraction. This method simplifies the calculation and provides a clear step-by-step process. Perfect for students in Grades 4-6.

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