А) 90*25+10*25=25(90+10)=25*100=2500
Б)123*27-23*27=27*(123-23)=27*100=2700
25*(10+90)=25*100=2500
27*(123-23)=27*100=2700
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А) 90*25+10*25=25(90+10)=25*100=2500
Б)123*27-23*27=27*(123-23)=27*100=2700
25*(10+90)=25*100=2500
27*(123-23)=27*100=2700