101x98简便计算的3种
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101x98
=(100+1)×98
=100×98+1×98
=9800+98
=9898
101x98
=101×(100-2)
=101×100-101×2
=10100-202
=9898
101x98
=(100+1)(100-2)
=100×100-100×2+1×100-1×2
=10000-200+100-2
=9800+98
=9898
=(100+1)×98
=100×98+1×98
=9800+98
=9898
101x98
=101×(100-2)
=101×100-101×2
=10100-202
=9898
101x98
=(100+1)(100-2)
=100×100-100×2+1×100-1×2
=10000-200+100-2
=9800+98
=9898
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