Вставь пропущенные числа. + (14-9) 15 = 90 9. -90 = 9 -(15 - 8) · 9 = 10 14.5- = 35 45-6.7+ = 41 90:6: 3=9 75-4.3+ = 70 92:4- :4=5

Ответ:

1. \[x + (14-9) \cdot 15 = 90\] \[x + 5 \cdot 15 = 90\] \[x + 75 = 90\] \[x = 90 - 75\] \[x = 15\]
2. \[9 \cdot x - 90 = 9\] \[9 \cdot x = 99\] \[x = 11\]
3. \[x - (15 - 8) \cdot 9 = 10\] \[x - 7 \cdot 9 = 10\] \[x - 63 = 10\] \[x = 73\]
4. \[14 \cdot 5 - x = 35\] \[70 - x = 35\] \[x = 35\]
5. \[45 - 6 \cdot 7 + x = 41\] \[45 - 42 + x = 41\] \[3 + x = 41\] \[x = 38\]
6. \[90 : 6 : x \cdot 3 = 9\] \[15 : x \cdot 3 = 9\] \[15 : x = 3\] \[x = 5\]
7. \[75 - 4 \cdot 3 + x = 70\] \[75 - 12 + x = 70\] \[63 + x = 70\] \[x = 7\]
8. \[92 : 4 - x : 4 = 5\] \[23 - x : 4 = 5\] \[x : 4 = 18\] \[x = 72\]

• 15 + (14-9) ⋅ 15 = 90
• 9 ⋅ 11 - 90 = 9
• 73 - (15 - 8) ⋅ 9 = 10
• 14 ⋅ 5 - 35 = 35
• 45 - 6 ⋅ 7 + 38 = 41
• 90 : 6 : 5 ⋅ 3 = 9
• 75 - 4 ⋅ 3 + 7 = 70
• 92 : 4 - 72 : 4 = 5

Ответ: