The image shows a series of arithmetic addition and subtraction exercises under different question numbers. There are two parts:

1. On the left page (Questions 16, 17, and 18):
   Each problem involves a series of additions and subtractions that students are supposed to solve using an abacus and write down the final values.

2. On the right page (Questions 1, 2, and 3):
   These problems also require calculations, but without using the abacus. Students need to perform mental addition and subtraction and write down the results.

Let’s Solve Each Question:

Left Page

1. Question 16:

   • $0 + 1 + 6 - 8 + 3 - 0 - 7 - 9 - 4 + 6 - 0 - 6 + 9 - 3 + 5 - 6 + 1 + 0 - 5 - 0 - 6 + 3 - 9 - 8 = 81$
     Final value: 81

2. Question 17:

   • $0 + 9 - 8 + 3 - 6 - 0 + 5 - 6 + 1 - 2 - 3 + 1 - 5 - 5 - 0 - 9 - 6 + 5 - 0 - 2 - 7 + 7 - 3 + 3 - 0 + 5 - 0 - 6 - 3 - 1 + 0 - 5 - 4 = 25$
     Final value: 25

3. Question 18:

   • $1 + 3 - 2 + 7 - 9 + 0 + 6 + 5 - 5 - 2 - 3 - 1 - 0 + 7 - 3 - 1 - 0 + 9 - 4 + 1 - 0 - 9 - 0 + 7 - 9 - 0 = 26$
     Final value: 26

Right Page

1. Question 1:

   • $2 + 6 - 0 - 3 - 5 - 4 - 0 - 2 + 0 - 3 - 4 - 0 - 1 + 6 - 8 + 5 + 5 - 2 + 1 - 4 + 0 - 4 - 0 - 2 + 0 + 3 = 35$
     Final value: 35

2. Question 2:

   • $1 + 8 - 0 - 4 + 5 - 0 + 6 + 2 + 5 - 0 + 8 - 7 + 3 - 0 + 1 - 4 - 2 + 3 + 0 - 5 - 7 - 9 - 5 - 0 - 3 + 0 + 2 + 0 + 1 = 14$
     Final value: 14

3. Question 3:

   • $3 + 7 - 0 - 2 - 8 - 0 - 2 + 1 - 4 - 0 - 7 - 3 + 2 + 9 - 3 - 0 - 4 + 0 - 3 - 8 - 0 + 6 - 1 - 4 + 0 + 2 + 8 - 1 = -11$
     Final value: -11

Let me know if you need the detailed step-by-step breakdown for any of these!

Here are 5 related questions to expand your learning:

1. How can you solve multi-step addition and subtraction problems faster?
2. What strategies help with mental math calculations?
3. How does using an abacus improve accuracy in arithmetic?
4. Can you practice similar problems without writing steps on paper?
5. What are real-life applications of quick addition and subtraction?

Tip: When working on long arithmetic sequences, always check each step carefully to avoid small errors that compound.