Let's analyze and solve the problems in the image step-by-step.

First Part: Multiple-Choice Questions

1. $319 \times 205 =$
2. $7890 - 156 = (79 + 20)$
3. $825 \div 25 =$
4. Which of the following is equal to $1.75 \times 2.5$?
   • A. $7.5 \times 2.89 + 2.81$
   • B. $7.5 \times 2.5$
   • C. $7.5 \times 2$
   • D. $4.5 \times 9.4$
5. Solve the following using parentheses:
   • $4800 \div 16 \div (7 \div 28)$
6. $8 \times 125 =$
7. $(3 \times 2) + (7 - 4)$
8. $32 \div (8 \div 2) =$
9. Fill in the missing number in the grid provided.

Second Part: Written Response Questions

10. Calculate $480 \div 60 \div 8$.
11. $825 - 455.5 =$
12. A problem involving the calculation of the volume of a cube given the side length.
13. A problem asking for the ratio in simplified form.
14. Calculate the difference between two large numbers.
15. Solve a problem involving addition and multiplication of decimal numbers.

For the second part, without specific details from the image, I'll address general methods to solve these types of problems.

Would you like to focus on solving any specific questions from the above list, or do you need detailed solutions for all of them? Please specify.

Here are 5 questions you can ask:

1. How do you solve complex division problems?
2. What is the method to simplify ratios?
3. How can you solve problems involving multiple operations?
4. What are some tips for solving volume problems of cubes?
5. How do you perform addition and multiplication with decimals?

Tip: Always double-check your work for calculation errors, especially when dealing with multiple operations and large numbers.