vă rog imi trebuie până mâine

Răspuns:
a. 18 ÷ 9 + 7 × 5 = 45 -» (18 ÷ 9 + 7) × 5 = 45
Verificare: (18 ÷ 9 + 7) × 5 = (2 + 7) × 5 = 9 × 5 = 45
b. 8 ÷ 4 ÷ 2 + 6 × 2 = 2 -» 8 ÷ (4 ÷ 2 + 6) × 2 = 2
Verificare: 8 ÷ (4 ÷ 2 + 6) × 2 = 8 ÷ (2 + 6) × 2 = 8 ÷ 8 × 2 = 1 × 2 = 2
c. 5 × 8 ÷ 4 + 6 - 2 = 38 -» 5 × (8 ÷ 4 + 6) - 2 = 38
Verificare: 5 × (8 ÷ 4 + 6) - 2 = 5 × (2 + 6) - 2 = 5 × 8 - 2 = 40 - 2 = 38
d. 5 × 8 ÷ 4 + 6 - 2 = 30 -» 5 × (8 ÷ 4 + 6 - 2) = 30
Verificare: 5 × (8 ÷ 4 + 6 - 2) = 5 × (2 + 4) = 5 × 6 = 30
==strphcriz09==