Current location - Training Enrollment Network - Mathematics courses - What do the first and second weights of math problems in stamps mean?
What do the first and second weights of math problems in stamps mean?
Surface mail, the first weight within 20g 1.2 yuan, this is the first weight.

Empty envelopes less than 20 grams, even a few grams, are calculated according to the tariff of 20 grams.

Then if it exceeds 20g, that is, from 2 1 g, every 20g counts as 1.2 yuan until it reaches100g, and the charge for every 20g 1.2 yuan is continuous weight.

If it exceeds 100g, every 100g 2 yuan, this is another continuous charging method.

Strictly speaking, the letter charge of 20.000 1g and 39.9999g is the same.