31/356, 28/365,31/365,30/365,31/365,30/365,31/356,31/365,30/365,31/365,30/365,31/365
Високосный:
31/366,29/366,31/366,30/366,31/366,30/366,31/366,31/366,30/366,31/366,30/366, 31/366
Решение:
1) 10.000-62.400: 400*28
10.000 - 62.400 * 28 : 400
10.000 - 1.747.200 : 400
10.000 - 4.368 = 5.632
Ответ: 5.632
2) 50.500 - (28 * 300 + 1.600) - 6.570 : 90 * 126
50.500 - (8400 + 1600) - 6570 * 126 : 90
50.500 - (8400 + 1600) - 827.820 : 90
50.500 - (8400+1600) - 9198
50.500 - 10.000 - 9.198
50.500 - 19.198 = 31.302
Ответ: 31.302
Х - было, 3х - стало
<span>разница (3х-х)/х*100%=200%</span>
<span>x - </span>³/₂₀ = ⁴/₅ - ¹/₂
x - ³/₂₀ = ⁴ˣ²/₁₀ - ¹ˣ⁵/₁₀
x - ³/₂₀ = ⁴ˣ²/₁₀ - ¹ˣ⁵/₁₀
x - ³/₂₀ = ⁸/₁₀ - ⁵/₁₀
x - ³/₂₀ = ⁸⁻⁵/₁₀
x - ³/₂₀ = ³/₁₀
x = ³/₁₀ + ³/₂₀
x = ³ˣ²/₂₀ + ³/₂₀
x = ⁶/₂₀ + ³/₂₀
x = ⁶⁺³/₂₀
x = ⁹/₂₀