Example: 4-ring resistance is: red, yellow, red, gold, reading is 2700Ω=2.7K, error is ±5%

Example: 4-ring resistance is: orange, white, red, silver, reading is 3900Ω=3.9K, error is ±10%

Example: The 4-ring resistors are: Orange, Gold, Silver. Orange is 33, multiplied by 10-1 = 3.9Ω. The error is ±10%

Example: The 4-ring resistors are: yellow, purple, silver, silver. Yellow and purple are 47, multiplied by 10-2 = 0.47Ω. The error is ±10%

From the above, we know that we must be careful when reading the third color band as gold or silver, because it is a negative number of multiplication, and the resistance value is generally 0.1-9.9Ω.