I would never have expected this level of vitriol about a faulty test item.

[Journeyman]

11. I agree. I also thought the structure of the question a bit odd. . .

Are first graders expected to understand language like that? "Related subtraction sentence" seems a very stilted way to explain anything to a six year old. And yes, there not being a subtraction answer certainly confuses the issue. Look at how much debate it generated amongst a discussion group composed of adults. In a room full of little kids, something like that would generate more blank looks, I suspect, than it would eager participation.

All this said, I have to point out that it appears to be, if anything, a preafrooding failure. As a graphic designer & typographer from way back, I'm offended by such shoddy craftsmanship. Especially when the end user is intended to be little children in a learning environment.