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Repede , va rog frumos..

Repede Va Rog Frumos class=

Răspuns :

1.
-5*11=-55
11*-234= -2574
(-5*11*) *-234=12870
-5*(11*-234)=12870
-5*11+-5*-234=1115
-5(11-234)=-5*-223=1115
2.
51*-10=-510
-10*5=-50
(51*-10)*5=-2550
51*(-10*5)=-2550
51*-10+51*5=-510+255=-255
51*(-10+5)=51*-5=-255
3.
0*81=0
81*-101=-8181
(0*81)*-101=0
0*(81*-101)=0
0*81+0*-101=0+0=0
0*(81-101)= 0*-20=0