Exploring Function Machines in First Grade Math

What does the +2 function machine do to the number 3?

• It multiplies by 2, making it 6

• It subtracts 2, making it 1

• It divides by 2, making it 1.5

• It adds 2, making it 5

What is the output of the +2 function machine when the input is 10?

• 8

• 20

• 12

• 5

What result does the -6 function machine produce when given the number 9?

• 3

• 15

• 6

• 0

How does the -6 function machine modify the number 12?

• 6

• 18

• 8

• 12

If the mysterious function machine was guessed to be a +2 machine, what incorrect output did it produce with the input 5?

• 9

• 10

• 7

• 5

What incorrect assumption was initially made about the mysterious function machine?

• It subtracts 2

• It adds 2

• It multiplies by 2

• It divides by 2

What was the output when the number 6 was input into the mysterious function machine?

• 10

• 8

• 6

• 12

What was the output when the number 8 was input into the mysterious function machine?

• 16

• 4

• 8

• 12

What consistent operation did the mysterious function machine perform?

• Added 4

• Subtracted 4

• Multiplied by 4

• Divided by 4

What final conclusion was made about the operation of the mysterious function machine?

• It divides each input by 4

• It adds 4 to each input

• It multiplies each input by 4

• It subtracts 4 from each input