Patterns and Input/Output Tables — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. If the Grade 4 rule is multiply by 2 then add 1, what output does input 3 give?
A) 6
B) 7
C) 8
D) 9
3 times 2 is 6 and 6 plus 1 is 7, so the Grade 4 output is 7.
2. Using the Grade 4 rule multiply by 3 then subtract 2, what is the output for input 5?
A) 11
B) 12
C) 13
D) 14
5 times 3 is 15 and 15 minus 2 is 13, so the Grade 4 output is 13.
3. If the Grade 4 rule is multiply by 4 plus 3 and the output is 23, what was the input?
A) 3
B) 4
C) 5
D) 6
23 minus 3 is 20 and 20 divided by 4 is 5, so the Grade 4 input was 5.
4. For the Grade 4 rule add 2 then multiply by 5, what output does input 4 give?
A) 20
B) 22
C) 30
D) 32
4 plus 2 is 6 and 6 times 5 is 30, so the Grade 4 output is 30.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Using the Grade 4 rule multiply by 2 plus 1, input 6 gives output 13.
6 times 2 is 12 and 12 plus 1 is 13, the correct Grade 4 output.
2. If the Grade 4 rule is multiply by 3 minus 4 and input is 5, the output is 11.
5 times 3 is 15 and 15 minus 4 is 11, the Grade 4 output.
3. With the Grade 4 rule multiply by 5 plus 2, output 27 came from input 5.
27 minus 2 is 25 and 25 divided by 5 is 5, so the Grade 4 input was 5.
4. Using the Grade 4 rule add 3 then multiply by 4, input 2 gives output 20.
2 plus 3 is 5 and 5 times 4 is 20, so the Grade 4 output is 20.
5. If the Grade 4 rule is multiply by 6 minus 5 and the input is 4, the output is 19.
4 times 6 is 24 and 24 minus 5 is 19, the Grade 4 output.