Coaching Centre
Units of time
Converting between seconds, minutes, hours, days and weeks, and working with hours and minutes as decimals.
Converting units
How many seconds are in $2$ hours?
$2 \times 60 = 120$ min
$120 \times 60 = 7200$ s
Decimal hours
Write $2.35$ hours in hours and minutes.
$0.35 \times 60 = 21$ minutes.
$2.35$ h $= 2$ h $21$ min.
Seconds in an hour
$3600$
$0.75$ h in minutes
$45$ min
Hours in a week
$168$
How many seconds are in $2$ hours?
$2 \times 3600$.
$2.35$ h $= 2$ h and how many minutes?
$0.35 \times 60$.
Write $1$ h $30$ min in hours.
$30$ min is half an hour.
Write $0.75$ h in minutes.
$0.75 \times 60$.
How many hours are in a week?
$7 \times 24$.
Write $450$ seconds in minutes.
$450 \div 60$.
Write $135$ minutes in hours (decimal).
$135 \div 60$.
How many minutes are in one day?
$24 \times 60$.
New numbers every time. Keep going until you get five in a row.