有關99x99的精選大全

印度99x99乘法口訣怎樣背
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...
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