Mom bought 18 steamed stuffed bun and ate half the leftover steamed stuffed bun. How many steamed buns did she eat?
Nine steamed buns. Mom bought 18 steamed buns, ate half of the remaining steamed buns, and calculated the remaining steamed buns: the remaining steamed buns are half of the total, the remaining steamed buns are = 18/2=9, the number of steamed buns eaten is equal to the number of steamed buns bought minus the remaining steamed buns, and the number of steamed buns eaten is = 18-9=9.