While teaching sixth grade math yesterday, I came across this tricky question in the “Pearson Math Makes Sense” textbook. Unfortunately, it didn’t take long for things to NOT make sense.
The book shows the following input / output table.
It notes that some of the outputs were intentionally incorrect and asks students to identify and correct the mistakes. That was easy enough but it then asks students to “Write the pattern for the input.”
This is where I became lost.