如题所述
72×100×72×45
=72²×45×100
=(70+2)²×45×100
=(70²+2×70×2+2²)×45×100
=(4900+280+4)×45×100
=5184×45×100
=5184×(50-5)×100
=(5184×50-5184×5)×100
=(259200-25920)×100
=233280×100
=23328000
=72²×45×100
=(70+2)²×45×100
=(70²+2×70×2+2²)×45×100
=(4900+280+4)×45×100
=5184×45×100
=5184×(50-5)×100
=(5184×50-5184×5)×100
=(259200-25920)×100
=233280×100
=23328000
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第1个回答 2022-07-05
72×72×45直接运算，最后加上两个0：
72×72×45×100=233280 00
72×72×45×100=233280 00
第2个回答 2022-07-05
72x100x72x45
=7200x72x45
=7200x3240
=23328000
=7200x72x45
=7200x3240
=23328000
