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2.  Subtract 34 minutes 15 seconds from 40 minutes 37 seconds

                                     a) 8 minutes 50 seconds

                                     b) 6 minutes 22 seconds

                                     c) 7 minutes 20 seconds

                                     d) 6 minutes 26 seconds


                           3. 36 hour 42 minutes + 14 hour 28 minutes =



                                     a)  51 hours 10 minutes

                                     b)  44 hours 20 minutes

                                     c)  50 hours 80 minutes

                                     d)  60 hours


                           4. Find the total time of 10 minutes + 68 minutes.


                                     a) 2 hours



                                     b) 1 hour 28 minutes


                                     c) 1 hour 18 minutes


                                     d) 78 hours
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