Having trouble figuring out if a decimal is a hundredth or thousandth? Turn the digits into zeros, and put a one in front of them. 2.345? 3 digits. 3, 4, and 5. 345 = 000 = 1000. Thousandth. BOOM.
None - I provided both the photo and the trick
Is this trick using work of your own without attribution? Click here to PM the user
and let them know!