Algebra equations worksheet for students to solve, including addition, subtraction, multiplication, and division problems.

To solve the equations in the worksheet, we need to determine the missing values that make each equation true. Let's go through each problem step by step.

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Equations 1–10:

#### 1. \( 20 + \_ = 40 \)
- To find the missing number, subtract 20 from 40:
\[
40 - 20 = 20
\]
- Answer: \( 20 \)

#### 2. \( 4 \times \_ = 16 \)
- To find the missing number, divide 16 by 4:
\[
16 \div 4 = 4
\]
- Answer: \( 4 \)

#### 3. \( 37 - \_ = 25 \)
- To find the missing number, subtract 25 from 37:
\[
37 - 25 = 12
\]
- Answer: \( 12 \)

#### 4. \( 18 + \_ = 30 \)
- To find the missing number, subtract 18 from 30:
\[
30 - 18 = 12
\]
- Answer: \( 12 \)

#### 5. \( 6 \times \_ = 24 \)
- To find the missing number, divide 24 by 6:
\[
24 \div 6 = 4
\]
- Answer: \( 4 \)

#### 6. \( \_ - 10 = 50 \)
- To find the missing number, add 10 to 50:
\[
50 + 10 = 60
\]
- Answer: \( 60 \)

#### 7. \( \_ + 25 = 50 \)
- To find the missing number, subtract 25 from 50:
\[
50 - 25 = 25
\]
- Answer: \( 25 \)

#### 8. \( \_ \times 4 = 16 \)
- To find the missing number, divide 16 by 4:
\[
16 \div 4 = 4
\]
- Answer: \( 4 \)

#### 9. \( \_ - 12 = 24 \)
- To find the missing number, add 12 to 24:
\[
24 + 12 = 36
\]
- Answer: \( 36 \)

#### 10. \( \_ + 60 = 80 \)
- To find the missing number, subtract 60 from 80:
\[
80 - 60 = 20
\]
- Answer: \( 20 \)

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Equations 11–20:

#### 11. \( 40 + \_ = 80 \)
- To find the missing number, subtract 40 from 80:
\[
80 - 40 = 40
\]
- Answer: \( 40 \)

#### 12. \( 5 \times \_ = 35 \)
- To find the missing number, divide 35 by 5:
\[
35 \div 5 = 7
\]
- Answer: \( 7 \)

#### 13. \( 35 - \_ = 20 \)
- To find the missing number, subtract 20 from 35:
\[
35 - 20 = 15
\]
- Answer: \( 15 \)

#### 14. \( 35 + \_ = 70 \)
- To find the missing number, subtract 35 from 70:
\[
70 - 35 = 35
\]
- Answer: \( 35 \)

#### 15. \( 11 \times \_ = 66 \)
- To find the missing number, divide 66 by 11:
\[
66 \div 11 = 6
\]
- Answer: \( 6 \)

#### 16. \( \_ - 30 = 30 \)
- To find the missing number, add 30 to 30:
\[
30 + 30 = 60
\]
- Answer: \( 60 \)

#### 17. \( \_ + 18 = 48 \)
- To find the missing number, subtract 18 from 48:
\[
48 - 18 = 30
\]
- Answer: \( 30 \)

#### 18. \( \_ \times 7 = 21 \)
- To find the missing number, divide 21 by 7:
\[
21 \div 7 = 3
\]
- Answer: \( 3 \)

#### 19. \( \_ - 20 = 40 \)
- To find the missing number, add 20 to 40:
\[
40 + 20 = 60
\]
- Answer: \( 60 \)

#### 20. \( \_ + 13 = 26 \)
- To find the missing number, subtract 13 from 26:
\[
26 - 13 = 13
\]
- Answer: \( 13 \)

---

Final Answers:

\[
\boxed{
\begin{array}{ll}
1. 20 & 11. 40 \\
2. 4 & 12. 7 \\
3. 12 & 13. 15 \\
4. 12 & 14. 35 \\
5. 4 & 15. 6 \\
6. 60 & 16. 60 \\
7. 25 & 17. 30 \\
8. 4 & 18. 3 \\
9. 36 & 19. 60 \\
10. 20 & 20. 13 \\
\end{array}
}
\]