Subtracting Hours and Minutes


A film starts at 4:53 p.m. and finishes at 6:26 p.m. How long is the film? hrs


mins 5 6 60+ 2 6


+ 4 5 3 1 3 3


Step 1: Subtract the minutes column. We cannot take 53 minutes away from 26 minutes. To help us subtract, we rename 6 hours to 5 hours and we bring the hour into the minutes column as 60 minutes.


Step 2: Now take away 53 from 86 (= 33) and write 33 in the minutes answer column.


Step 3: Take away the hour, 5 – 4 = 1, and write the answer in the hours answer column.


1. Complete the following.


a) hrs mins 5 26 2 39


–


b) hrs mins 2 13 1 28


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2. Complete the following in your copy. a) 3 hrs 21 minutes – 1 hr 28 mins c) 5 hrs 43 mins – 2 hrs 53 mins


c) hrs mins 3 47 1 51


–


d) hrs mins 1 34 55


–


b) 7 hrs 15 mins – 4 hrs 30 mins d) 1 hr 51 mins – 59 mins


3. Look at the TV guide below and answer the following questions. The Extreme Granny Channel


Start time 9:05pm 9:37pm 10:14pm 12:05am 12:37am 1:00am


Show Extreme Knitting When Sewing Goes Dangerously Wrong


The Old Women Who Lived in a Shoe – Hollywood true story The Deadliest Stitch Walking Stick Battles Closedown


a) What is the duration of Extreme Knitting? b) Which show is the longest?


c) What is the difference between the longest show and the shortest show?


d) How long is The Deadliest Stitch on for? e) How long is Walking Stick Battles?


Time 159


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