Salut din nou!
A) (-21)•(-8)•3•(-25)= -12600
1) (-25)•(-8)=200
2) 3•(-21)= -63
3) -63 • 200 = -12600
C)(-13)•52+48•(-13)= 1690
1) 52+48 =100
2) (-13)•(-13)= 169
3) 169• 100 = 1690
E) -5•13+(-5)•17 = 750
1)13+17=30
2)-5 • (-5) = 25
3) 25 • 30 = 750
G) (-23)•(-15)-23•16= -8640
1) (-23)-23= -46
2) (-15)•16 = 240
3) -46•240= -8640