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计算下面各题,怎样简便就怎样算.2X125X8X5125X897X835X10计算下面各题,怎样简便就怎样算.2X125X8X5125X897X835X101973X5X268X99

题目详情
计算下面各题,怎样简便就怎样算. 2X125X8X5 125X897X8 35X10
计算下面各题,怎样简便就怎样算. 2X125X8X5 125X897X8 35X101 973X5X2 68X99
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答案和解析
2X125X8X5
=125X8X2X5
=1000X10
=10000
125X897X8
=125X8X897
=1000X897
=897000
35X101
=35X(100+1)
=35X100+35X1
=3535
973X5X2
=973X10
=9730
68X99
=68X(100-1)
=68X100-68
=6800-68
=6732
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