Предмет: Математика, автор: Батырбекова

147*85+53*60+147*15+53*40 решите  рациональным способом 

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Автор ответа: frich1
0
147*85+53*60+147*15+53*40=147*(85+15)+
+53*(60+40)=147*100+53*100=100(147+53)=
=100*200=20000
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