有关99x99的精选大全

印度99x99乘法口诀怎样背
印度人是这样算的:&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp第一步:&nbsp&nbsp&nbsp先把被乘数(13)跟乘数的个位数(2)加起来&nbsp&nbsp&nbsp13+2=15&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp第二步:&nbsp&nbsp&nbsp然后把第一步的答案乘以10(→也就是说...
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