1. Which multiplication sentence correctly checks the division problem $24 \div 6 = 4$?
2. To check that $35 \div 5 = 7$ is correct, you can multiply the quotient and the divisor. Complete the check: $7 \times 5 = \_\_\_$
3. Solve the division problem. $54 \div 9 = \_\_\_$
4. Find the sum of the following numbers: $4,261 + 3,527 = \_\_\_$
5. Maria solved $48 \div 8 = 6$. Which equation can she use to check if her answer is correct?
6. A video game company sold 48,359 copies of a game in the first month and 63,472 copies in the second month. What is the total number of copies sold? ___
7. When adding the numbers $8,124$ and $5,693$ using pencil and paper, which column's digits should you add first?
8. Find the sum: $6,590 + 845 + 73 = \_\_\_$
9. When calculating the sum of $36,485$ and $21,342$, what digit is carried over from the hundreds column to the thousands column?
10. A library has 125,472 books. It receives a donation of 89,650 more books. How many books does the library have in total? ___