There are strict regulations on the quality of football used in formal football matches. The following are the quality test results of six football matches (use positive numbers to record the grams that exceed the specified quality, and use negative numbers to record the grams that are less than the specified quality): - 25, + 10, - 20, + 30, + 15, - 40

There are strict regulations on the quality of football used in formal football matches. The following are the quality test results of six football matches (use positive numbers to record the grams that exceed the specified quality, and use negative numbers to record the grams that are less than the specified quality): - 25, + 10, - 20, + 30, + 15, - 40

|-25 | = 25, | + 10 | = 10, | - 20 | = 20, | + 30 | = 30, | + 15 | = 15, | - 40 | = 40, ∵ 10 | - 15 | - 20 | - 25 | - 30 |, the quality test results show that the football quality of + 10 is better