1. Master Liu used to take 10 minutes to process a part, but now it is less. 2. How many hours does it take to process a part in one hour? 2

1. Master Liu used to take 10 minutes to process a part, but now it is less. 2. How many hours does it take to process a part in one hour? 2

10-2.5 = 7.5 = 4 branch 3
1 hour = 60 minutes
60 * 4 branch 3 = 45
45 minutes
I'm in sixth grade
Give me good comments
speed