Practice using function tables to find outputs, inputs, and simple rules with addition, subtraction, and multiplication.
Read each function table problem carefully. Use the rule to find the missing numbers. Show your work in the space provided.
Find the rule and complete the table
Math - Grade 2-3
- 1
Rule: Add 2. If the input is 5, what is the output?
- 2
Rule: Add 3. Complete the table: Input 1 gives Output 4. Input 2 gives Output 5. Input 3 gives Output blank. What is the missing output?
- 3
Rule: Subtract 1. If the input is 9, what is the output?
- 4
Rule: Add 5. Complete the table: Input 0 gives Output 5. Input 1 gives Output 6. Input 4 gives Output blank. What is the missing output?
- 5
Rule: Double the input. If the input is 6, what is the output?
- 6
Look at the pairs: 2 goes to 4, 3 goes to 6, and 5 goes to 10. What is the rule?
- 7
Rule: Add 10. Complete the table: Input 7 gives Output blank. Input 8 gives Output 18. Input 9 gives Output blank. What are the missing outputs?
- 8
Rule: Subtract 2. If the output is 6, what input was used?
- 9
Rule: Add 4. Complete the table: Input blank gives Output 10. What is the missing input?
- 10
Look at the table: Input 1 gives Output 3. Input 2 gives Output 4. Input 5 gives Output 7. What is the rule?
- 11
Rule: Subtract 3. Complete the table: Input 8 gives Output 5. Input 10 gives Output blank. Input 12 gives Output blank. What are the missing outputs?
- 12
Rule: Add 1. The inputs are 4, 5, and 6. What are the outputs?
- 13
A function machine uses the rule add 6. Nina puts in 3. What number comes out?
- 14
A function machine uses the rule double the input. Sam puts in 4, then 5, then 7. What numbers come out?
- 15
Look at the pairs: 6 goes to 4, 8 goes to 6, and 9 goes to 7. What is the rule?