Question

find the difference between : (a) 25 hours 19 minutes and 10 hours 9 minutes
(b) 15 hours 20 minutes and 9 hours 40 minutes​

Answer 1

Answer:

17 sec. < 32 sec.

So, we borrow 1 min.

= 60 sec. from 28 min.

60 sec. + 17 sec. = 77 sec.

77 sec. – 32 sec. = 45 sec.

27 min < 46. So we borrow 1 hr.

= 60 min . from 22 hr.

60 min. + 27 min. = 87 min.

87 min – 46 min. = 41 min.

Answer 2

Answer:

Step-by-step explanation:

(a)

Hours                  Minutes

25                        19

10                        09      ( - )

------------------------------

15                         10

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∴ 25 hours and 19 minutes - 10 hours and 9 minutes = 15 hours 10 minutes

(b)

Hours                   Minutes

15                          20

09                         40   ( - )

--------------------------------

05                        40

-------------------------------

∴ 15 hours and 20 minutes - 9 hours and 40 = 5 hours and 40 minutes