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I can see that you are working on subtraction problems, and it looks like there are several equations in your worksheet. I'll help you by showing the step-by-step work for each of the following problems:

1. **b. \( 720 - 312 \)**:
   - Start from the rightmost digit:
     - \( 0 - 2 \): Borrow from the tens place (7 becomes 6), making 10 in the ones place.
     - \( 10 - 2 = 8 \)
     - \( 6 - 1 = 5 \)
     - \( 7 - 3 = 4 \)
   - Final result: \( 408 \)

2. **c. \( 205 - 84 \)**:
   - Start from the rightmost digit:
     - \( 5 - 4 = 1 \)
     - \( 0 - 8 \): Borrow from the hundreds place (2 becomes 1), making 10 in the tens place.
     - \( 10 - 8 = 2 \)
     - \( 1 - 0 = 1 \)
   - Final result: \( 121 \)

3. **e. \( 542 - 413 \)**:
   - Start from the rightmost digit:
     - \( 2 - 3 \): Borrow from the tens place (4 becomes 3), making 12 in the ones place.
     - \( 12 - 3 = 9 \)
     - \( 3 - 1 = 2 \)
     - \( 5 - 4 = 1 \)
   - Final result: \( 129 \)

4. **f. \( 992 - 787 \)**:
   - Start from the rightmost digit:
     - \( 2 - 7 \): Borrow from the tens place (9 becomes 8), making 12 in the ones place.
     - \( 12 - 7 = 5 \)
     - \( 8 - 8 = 0 \)
     - \( 9 - 7 = 2 \)
   - Final result: \( 205 \)

5. **h. \( 239 - 192 \)**:
   - Start from the rightmost digit:
     - \( 9 - 2 = 7 \)
     - \( 3 - 9 \): Borrow from the hundreds place (2 becomes 1), making 13 in the tens place.
     - \( 13 - 9 = 4 \)
     - \( 1 - 1 = 0 \)
   - Final result: \( 47 \)

6. **i. \( 406 - 374 \)**:
   - Start from the rightmost digit:
     - \( 6 - 4 = 2 \)
     - \( 0 - 7 \): Borrow from the hundreds place (4 becomes 3), making 10 in the tens place.
     - \( 10 - 7 = 3 \)
     - \( 3 - 3 = 0 \)
   - Final result: \( 32 \)

If you want to see any of the steps more detailed, or have questions, let me know!

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Here are five related questions:

1. How do you handle borrowing when subtracting large numbers?
2. Can you explain why borrowing is necessary in subtraction?
3. What would happen if you forget to borrow when needed?
4. How can you verify your subtraction results?
5. How does place value affect subtraction?

**Tip:** Always double-check subtraction problems by adding the result to the number subtracted. If the sum equals the original number, the subtraction is correct.

Learn how to solve subtraction problems involving borrowing, including step-by-step solutions for equations like 720 - 312, 205 - 84, and more. This guide covers key subtraction concepts and is suitable for students in Grades 3-5.

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