99x99的精選

印度人是這樣算的：&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp第一步：&nbsp&nbsp&nbsp先把被乘數（13）跟乘數的個位數（2）加起來&nbsp&nbsp&nbsp１３＋２＝１５&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp第二步：&nbsp&nbsp&nbsp然後把第一步的答案乘以１０(→也就是説...