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Karla2
a fost răspuns

2•{100+7•300-5•(2730-25•108)]}•10-9•21

Răspuns :

2×{100+7×300-5×(2730-25×108)}×10-9×21 =2×{100+7×300-5×(2730-2700)}×10-189 =2×[100+7×300-5×30]×10-189 2×(100+2100-150)×10-189 2×(2200-150)×10-189 2×2050×10-189 4100×10-189 41000-189 =40811
2•{100+7•300-5•(2730-25•108)}•10-9•21=2•{100+2100-5•(2730-2700)}•10-189=2•(2200-5•30)•10-189=2•2050•10-189=41000-189=40811
sper sa fie corect,nu sunt sigura