简便计算99x612
简便计算
99x612
=(100-1)×612
=100×612-612
=61200-612
=60588
99x612
=(100-1)×612
=100×612-612
=61200-612
=60588
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第1个回答 2017-04-04
99x612
=(100-1)x612
=100x612-612
=61200-612
=60588
=(100-1)x612
=100x612-612
=61200-612
=60588