Mixed Operations Equations Missing Variable — Set 21
8 ○ 10 = 80, what is ○?
Show answer
Answer: ×
- SubType
- ×
- Operand1
- 8
- Operand2
- 10
- Result
- 80
- Difficulty
- normal
9 ○ 7 = 2, what is ○?
Show answer
Answer: -
- SubType
- -
- Operand1
- 9
- Operand2
- 7
- Result
- 2
- Difficulty
- normal
17 ○ 8 = 9, what is ○?
Show answer
Answer: -
- SubType
- -
- Operand1
- 17
- Operand2
- 8
- Result
- 9
- Difficulty
- normal
1 ○ 8 = 9, what is ○?
Show answer
Answer: +
- SubType
- +
- Operand1
- 1
- Operand2
- 8
- Result
- 9
- Difficulty
- normal
6 ○ 2 = 12, what is ○?
Show answer
Answer: ×
- SubType
- ×
- Operand1
- 6
- Operand2
- 2
- Result
- 12
- Difficulty
- normal
7 __ 2 = 14
Show answer
Answer: ×
- SubType
- ×
- Operand1
- 7
- Operand2
- 2
- Result
- 14
- Difficulty
- normal
9 __ 7 = 16
Show answer
Answer: +
- SubType
- +
- Operand1
- 9
- Operand2
- 7
- Result
- 16
- Difficulty
- normal
5 ○ 3 = 8, what is ○?
Show answer
Answer: +
- SubType
- +
- Operand1
- 5
- Operand2
- 3
- Result
- 8
- Difficulty
- normal
5 __ 9 = 14
Show answer
Answer: +
- SubType
- +
- Operand1
- 5
- Operand2
- 9
- Result
- 14
- Difficulty
- normal
6 __ 4 = 2
Show answer
Answer: -
- SubType
- -
- Operand1
- 6
- Operand2
- 4
- Result
- 2
- Difficulty
- normal
10 __ 2 = 20
Show answer
Answer: ×
- SubType
- ×
- Operand1
- 10
- Operand2
- 2
- Result
- 20
- Difficulty
- normal
12 __ 6 = 2
Show answer
Answer: ÷
- SubType
- ÷
- Operand1
- 12
- Operand2
- 6
- Result
- 2
- Difficulty
- normal
9 __ 3 = 3
Show answer
Answer: ÷
- SubType
- ÷
- Operand1
- 9
- Operand2
- 3
- Result
- 3
- Difficulty
- normal
6 ○ 3 = 3, what is ○?
Show answer
Answer: -
- SubType
- -
- Operand1
- 6
- Operand2
- 3
- Result
- 3
- Difficulty
- normal
1 __ 6 = 7
Show answer
Answer: +
- SubType
- +
- Operand1
- 1
- Operand2
- 6
- Result
- 7
- Difficulty
- normal
8 ○ 1 = 9, what is ○?
Show answer
Answer: +
- SubType
- +
- Operand1
- 8
- Operand2
- 1
- Result
- 9
- Difficulty
- normal
36 __ 9 = 4
Show answer
Answer: ÷
- SubType
- ÷
- Operand1
- 36
- Operand2
- 9
- Result
- 4
- Difficulty
- normal
18 ○ 9 = 9, what is ○?
Show answer
Answer: -
- SubType
- -
- Operand1
- 18
- Operand2
- 9
- Result
- 9
- Difficulty
- normal
4 __ 7 = 11
Show answer
Answer: +
- SubType
- +
- Operand1
- 4
- Operand2
- 7
- Result
- 11
- Difficulty
- normal
Teaching Notes
Browse free mixed operations worksheets. Each set includes an answer key and covers key skills aligned with Common Core standards.
Features
- Printable PDF format
- Answer key included
- Multiple difficulty levels
- Classroom and home friendly
How to Use These Worksheets
- Select a mixed operations set.
- Print or use on-screen.
- Check answers and practice again.
Tips
- Start with easier sets and move up gradually.
- Practice in short sessions (10–15 minutes).
- Review mistakes and redo similar problems.
Frequently Asked Questions
What math skills are covered in these Mixed Operations Worksheets?
These worksheets cover mixed operations worksheets skills aligned with Common Core standards for K-3 students. Each set builds procedural fluency and conceptual understanding through varied problem formats.
Are these worksheets free to print?
Yes — all worksheets are completely free with no signup required. Click Print for a clean printout optimized for US Letter paper. PDF download is also available.
What grade level are these mixed operations worksheets for?
These worksheets are designed for Kindergarten through Grade 3 students. Topics match Common Core expectations for each grade level.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen to check student work quickly.
Can I use these for homeschool?
Absolutely. These worksheets are widely used by homeschool families for structured math practice. The set-number system lets you assign specific worksheets and track progress.