In geometry, they are nothing specific.
61/4 - 47/16 = 25/4 - 71/16 = 100/16 - 71/16 = 29/16 = 113/16
29+71=100
71 + 29 = 100
It is: 29+71 = 100
71/15 is in its simplest form.
71 + 15 = 86
The exterior dimensions of this 71-pound unit are 29 15/16" width x 16 11/32" height x 15 9/32" depth, while the interior measures 17 1/8" width x 8 1/6" height x 13 13/16" depth.
It is: -15+71 = 56
71
4 hours, 26 minutes, 15 seconds
71
29 + 50 + 21 = (29 + 50) + 21 = 79 + 21 = 100 or 29 + 50 + 21 = 29 + (50 + 71) = 29 + 71 = 100