> In fouth grade we had "time tests" where you had to do a page of sums and were graded based on how quickly you completed it. I never finished them in the maximum time allotted because I had to count on my fingers. Even today I will sometimes do that, or I will use offsets from a few sums that I do know. For example, 7+6. For some reason I know 7+7 is 14, so 7+6 is one less than that. Hence 13. Anyone else think this way as an adult?

When it comes to adding and subtracting, that's definitely me!