Mom wrote:54/9 + 4 =...(恕刪)
yvvy wrote:■中級(東大生正答率...(恕刪)
Ailio wrote:4×4-5-9=22...(恕刪)
南瓜籽 wrote:交給香腸來...[(...(恕刪)
netzero wrote:■ 神(東大生正答率2%)4,4,5,9 →