how do you solve 58 minutes and 50 seconds minus 9 minutes and 55 seconds?

To subtract 9 min 55 sec from 58 min 50 sec, we need to be consistent with our units. Convert the seconds into minutes or vise versa [Use the conversion factor of (60 sec / 1 min)]:

I'll go with the Seconds to Minute conversion:

(58 min + 50/60 min) - (9 min + 55/60 min)

58.83 min - 9.92 min

48.91 min

To state the answers into minutes and seconds, we multiply the decimal value (0.91) to 60 [Converting it back to seconds]:

(0.91)(60) = 54.6 sec or 55 sec


Answer: 48 min 55 sec

step 1: change "58 minutes" to "57 minutes and 60 seconds"

Step 2: Subtraction:
57 min 110 sec
- 9 min 55 sec
______________
48 min 55 sec

1 minute = 60 seconds
1 second = 1/60 minute

(58 minutes and 50 seconds) - (9 minutes and 55 seconds)
= (58 minutes - 9 minutes) + (50 seconds - 55 seconds)
= 49 minutes - 5 seconds
= (49 minutes - 1 minute) + (-5 seconds + 60 seconds)
= 48 minutes + 55 seconds
= 48 minutes and 55 seconds

Subtract 10 minutes from 58 min and 50 s
This is 48 min and 50 sec.

This is too low, because 10 minutes is 5 sec more than 9 min 55 sec.
So add the 5 sec on. ANS: 48 min 55 sec.

Convert them into the same units.

~~~~~~~~~~~~~~~~~~~~~~~~~~~
CONVERSION TO MINUTES
~~~~~~~~~~~~~~~~~~~~~~~~~~~

58 minutes, 50 seconds =
58 minutes + [50 seconds * (minute / 60 seconds)] =
58 minutes + (5/6) minutes =
58 5/6 minutes

9 minutes, 55 seconds =
9 minutes + [55 seconds * (minute / 60 seconds =
9 minutes + (55/60) minutes =
9 minutes + (11/12) minutes =
9 11/12 minutes

[58 minutes + (5/6) minutes] - [9 minutes + (11/12) minutes] =
[58 minutes + (5/6)(2/2) minutes] - [9 minutes + (11/12) minutes] =
[58 minutes + (10/12) minutes] - [9 minutes + (11/12) minutes] =
58 minutes + (10/12) minutes - 9 minutes - (11/12) minutes =
58 minutes - 9 minutes + (10/12) minutes - (11/12) minutes =
49 minutes - (1/12) minutes
49 minutes - [(1/12) minutes * (60 seconds / minutes)] =
49 minutes - 5 seconds =
48 minutes + 1 minute - 5 seconds =
48 minutes + 60 seconds - 5 seconds =
48 minutes, 55 seconds

68 min 50 sec - 9 min 55 sec = 58 min and 55 sec