Patterns and Input/Output Tables — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. If 1 dog has 4 legs in a Grade 4 table, then 2 dogs have 8 legs.
The function rule is input times 4, so 2 times 4 equals 8 legs, which is the output for 2 dogs in this Grade 4 table.
2. Using the Grade 4 rule input times 4 for dog legs, 5 dogs have 20 legs.
5 times 4 equals 20, so the output for 5 dogs is 20 legs, following the function rule of this Grade 4 table.
3. If 1 car has 4 wheels, then 6 cars have 24 wheels in this Grade 4 table.
6 times 4 equals 24 wheels, so the output for 6 cars is 24 in this Grade 4 input/output sequence.
4. If 1 spider has 8 legs, then 3 spiders have 24 legs in the Grade 4 table.
3 times 8 equals 24 legs, so the output for 3 spiders is 24 in this Grade 4 multiplication input/output table.
5. If 1 bag holds 6 apples, then 4 bags hold 24 apples in this Grade 4 table.
4 times 6 equals 24 apples, so the output for 4 bags is 24 in this real-world Grade 4 function table.
6. If a Grade 4 rule says output equals input plus 7, the output for input 3 is 10.
3 plus 7 equals 10, so the output for input 3 is 10 in this Grade 4 addition function rule.
7. Using the Grade 4 rule input times 5 for fingers on hands, 4 hands have 20 fingers.
4 times 5 equals 20 fingers, so the output for 4 hands is 20 in this Grade 4 input/output table.
8. If the Grade 4 rule is output equals input minus 4 and the input is 12, the output is 8.
12 minus 4 equals 8, so the output for input 12 is 8 in this Grade 4 subtraction function rule table.
9. If 1 box holds 12 crayons, then 5 boxes hold 60 crayons in this Grade 4 table.
5 times 12 equals 60 crayons, so the output for 5 boxes is 60 in this real-world Grade 4 function table.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Grade 4 dog legs: input is 3 dogs
→ output is 12 legs
output is 12 legs
Grade 4 car wheels: input is 5 cars
→ output is 20 wheels
output is 20 wheels
Grade 4 rule input plus 9: input is 7
→ output is 16
output is 16
Grade 4 rule input times 6: input is 4
→ output is 24
output is 24
3 dogs times 4 equals 12 legs, 5 cars times 4 equals 20 wheels, 7 plus 9 equals 16, and 4 times 6 equals 24 in these Grade 4 tables.