I made this for my students to assess the mental math strategies that we have been discussing lately. In our number talks, we have been talking about counting up tens then adding the ones, breaking apart numbers into tens and ones, using basic addition facts/doubles to apply to bigger numbers, and other assorted strategies that the kiddos have come up with. I wanted a way to see if they are coming up with the correct answers using their strategies. I may use this as a graded assignment to assess what they've been learning. It can also be used just for practice.