3. Выполните вычисления: 70:14x13= 92: (46:2)x2= 170+320-200= 54: (90:5)= (610+20):7:90= 480:6+780=

Решение: 1. \(70 : 14 \times 13 = 5 \times 13 = 65\) 2. \(92 : (46 : 2) \times 2 = 92 : 23 \times 2 = 4 \times 2 = 8\) 3. \(170 + 320 - 200 = 490 - 200 = 290\) 4. \(54 : (90 : 5) = 54 : 18 = 3\) 5. \((610 + 20) : 7 : 90 = 630 : 7 : 90 = 90 : 90 = 1\) 6. \(480 : 6 + 780 = 80 + 780 = 860\) Ответ: * \(70 : 14 \times 13 = \textbf{65}\) * \(92 : (46 : 2) \times 2 = \textbf{8}\) * \(170 + 320 - 200 = \textbf{290}\) * \(54 : (90 : 5) = \textbf{3}\) * \((610 + 20) : 7 : 90 = \textbf{1}\) * \(480 : 6 + 780 = \textbf{860}\)