9801*99的简便计算,列递等式
问题描述:
9801*99的简便计算,列递等式
答
9801*99
=9801x(100-1)
=9801x100-9801
=980100-10000+199
=970100+199
=970299
答
9801*99
=9801x(100-1)
=9801x100-9801x1
=980100-9801
=970299