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12. Calculați: a) 119+5*{27+3*[210*202-2*(57-2*23)-149]*7}= b) 15+{37+19*[91+15*(317-81*3)+15*(15*41-400)-13]}= c){[(48*32-345)*2-(43*17-123)*3]+(23*2-12*3)*5-234}=

Răspuns :

Gicu1973
119+5*{27+3*[210*202-2*(57-46)-149]*7=119+5*[27+3*(210*202-2*9)-149]*7=119+5*[27+3*(42420-18)-149]*7=119+5*(27+3*42402-149)*7=119+5*(27+127206-149)*7=119+5*127084=119+635420=635539.b)15+{37+19*[91+15*(317-81*3)+15*(15*41-400)-13]}=15+{37+19*[91+15*(317-243)+15*215-13]}=15+[37+19*(91+15*74)+15*215-13]=15+[37+19*(91+1110)+3225-13]=15+(37+19*1201+3212)=15+(37+22819+3212)=15+26068=26083 c)={[(1536-345)*2-(731-123)*3]+(46-36)*5-234}=[(1191*2-608*3)+10*5-234=(2382-1824)+50-234=558+50-234=608-234=374

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