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a fost răspuns

efectueaza respectand ordinea 7×10-3×10+6×10;300-6×10-90;450-4×10-2×20

Răspuns :

Alex1313
70-30+60=100
300-60-90=150
450-40-40=370
Paul25
70-30+60=40+60=100
300-60-90=240-90=150
450-40-40=410-40=370

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