Calculation problem: 108. 18'25'' minus 56. 23'32''

The operation between angles requires 60 decimal. When the low order is not enough, borrow 1 from the high order. At this time, when 60,25'' is less than 32'', 1' is borrowed from 18', and when 60'', 18' is reduced accordingly. Less than 23. To 180. Borrow 1. When using 60 inches.

Clock Question: From 1: 15 to 1: 54, what are the angles of the minute hand and the hour hand of the clock?

First, calculate the elapsed time of the hour hand and the minute hand, and then multiply them by their respective rotational speeds.