74*83-183*25+83的简便运算

问题描述:

74*83-183*25+83的简便运算

原式=75×83-183*25=3*25*83-183*25=25*(3*83-183)=(249-183)*25=66*25=60*25 6*25=1500 150=1650

74*83-183*25+83=(74*83+83)-183*25=75*83-100*25-83*25=50*83-2500=4150-2500=1650

74*83-183*25+83
=74X83-(100+83)X25+83
=75X83-100X25-83X25
=(75-25)x83-100x25
=50x83-50x2x25
=50x(83-50)
=50x33
=1650

原式=74*83-83*25+83-100*25=83(74-25+1)-100*25=83*50-100*25=4150-2500=1650