1. The problem is to find the product of 9 and 50. 2. We use the multiplication formula: $a \times b = c$, where $a=9$ and $b=50$. 3. Notice that 50 can be written as $5 \times 10$, so: $$9 \times 50 = 9 \times (5 \times 10)$$ 4. By the associative property of multiplication: $$9 \times (5 \times 10) = (9 \times 5) \times 10$$ 5. Calculate $9 \times 5$: $$9 \times 5 = 45$$ 6. Now multiply by 10: $$45 \times 10 = 450$$ 7. Since $450 = 45$ tens, we can fill in the blanks: $9 \times 50 = (9 \times 5)$ tens $9 \times 50 = 45$ tens $9 \times 50 = 450$ Final answer: $450$