In this lesson, we will be sharing efficient methods for calculating the time intervals listed on timetables. By using the methods modelled, we will be able to identify missing information on incomplete timetables.
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When attempting to work out a time interval, which method listed is considered effective.
Bar modelling
Column addition and subtraction
Guessing
Correct answer: Number lines
Number lines
Q2.
Yasmin was told her school breaktime would be taking place at 10:45 today and last for 20 minutes. She wanted to work out what time she would be returning to class so she quickly wrote this calculation to find out. But she is incorrect. Can you explain why?
45 and 20 added together do not make 65
Correct answer: She has forgotten that there are only 60 minutes in an hour
She has forgotten that there are only 60 minutes in an hour
She has left out a 0 digit under the 10
She has not used analogue time and written 10.45am
Q3.
Oh no! The Olympic Games organizers have printed the schedule but there is an error they did not spot! For which sport is the error situated?
Correct answer: Basketball
Basketball
Cycling
Swimming
Weightlifting
Q4.
They never learn do they! A second mistake has been spotted on the same day, this time it was written on the second timetable that was released! But on which column is the mistake situated?
Correct answer: Diving
Diving
Hockey
Judo
Table Tennis
Q5.
Things have become very complicated down at the lake and the rowers are becoming very confused! Their schedules are full of errors. How many mistakes can you see in the table below?