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a fost răspuns

efectuati respectind ordinea operatiilor 42+8•5•2•10-(125+4•5•9)=

Răspuns :

42+8×5×2×10-(125+4×5×9)
42+8×5×2×10-(125+20×9)
42+8×5×2×10-(125+180)
42+8×5×2×10-305
42+40×2×10-305
42+80×10-305
42+800-305
842-305
=537
Mihaela306
42+8×5×2×10-(125+20×9)=42+8×5×2×10-(125+180)=42+8×5×2×10-300=42+40×20=42+600=642