1. To calculate $45 \times 23$, you can decompose $23$ into $20 + 3$. What is the partial product of $45 \times 20$? The answer is ___.
2. Which expression shows the correct way to find $53 \times 18$ using two partial products?
3. To calculate $71 \times 34$, the partial products found by decomposing $34$ are $284$ and $2130$. What is the total product? The total product is ___.
4. When calculating $28 \times 45$ by finding the values of $28 \times 5$ and $28 \times 40$, what are the results of these two smaller multiplications called?
5. Use the partial products method to solve $47 \times 25$. First, decompose $25$ into $20 + 5$. The total product is ___.
6. To find $53 \times 38$, you can decompose $38$ into $30 + 8$. What is the partial product of $53 \times 30$? The answer is ___.
7. Which expression shows the correct way to find $47 \times 23$ by decomposing $23$ into its tens and ones?
8. To calculate $71 \times 14$, the partial products are found to be $710$ and $284$. What is the total product? The total is ___.
9. When multiplying $85 \times 16$, the number $16$ is split into $10$ and $6$. What do the calculations $85 \times 10$ and $85 \times 6$ represent in the area model method?
10. Calculate $45 \times 31$ by decomposing $31$ into $30$ and $1$. Find the two partial products and add them to get the final answer. The final product is ___.