Converting time intervals | Year 4 Mathematics PDF Download

Understanding Time

• Our lives revolve around time.
• When you are born, the date and time of birth are recorded.
• At school, specific times are set for registration, lunch, breaks, and home time.
• You might count the weeks or months until an event.
• There are various measures of time, including seconds, minutes, hours, days, weeks, months, and years.

Converting Time Intervals

• It is essential to comprehend the significance of different time measures and to be able to convert them to determine equivalent time intervals.
• Understanding these conversions is crucial for navigating through various time intervals efficiently.

• Leap Years: Every four years, we encounter a leap year, which consists of 366 days instead of the usual 365 days. This additional day helps align the calendar year with the solar year.

Examples

Example 1: How many seconds are there in 5 and a half minutes?
There are 60 seconds in a minute. So what is 5 lots of 60 seconds?
Sol: 60 x 5 = 300
But how many seconds in half a minute? Well, half of 60 is 30.
Now add 300 and 30 together to find the answer.
300 + 30 = 330
So 5 and a half minutes is the same as 330 seconds.

Example 2: How many months are there in 3 years and 4 months?
Sol: There are 12 months in one year. So to find the amount of months in 3 years, we have to multiply 12 by 3.
12 x 3 = 36

36 months broken into 12 month blocks.
Now we can just add the remaining 4 months to 36 to find the total.
36 + 4 = 40
So 3 years and 4 months is the same as 40 months.