Question

Subtract
a) 7days 19 hours from 12 days 10 hours ​

Answer 1

7 days 19 hours = 24*7 +19

= 168 +19

= 187 hours

and 12 days 10 hours =12*24 +10

= 288 +10

=298

subtract 298-187

= 111

=96+15

=4 days 15 hours

Answer 2

=7×24+19

=168+19

=187

=12×24+10

=288+10

=298

=298-187

=111.