Category : 5th Class
Measurement
Length - metre (m) Mass (Weight) - gram (g) Capacity (Volume) - litre (Z)
Time - second (s) Temperature - degree Celsius (°C)
1 cm =10 mm; 1 m=100cm; 1 km = 1000m
1 g = 1000 mg; 1 kg = 1000 g; 1 tone = 1000 kg
1Z=1000 mZ;1 kZ=1000Z
1 hour = 60 minutes; 1 minute = 60 seconds
(a) Length:
(b) Mass:
(c) Capacity:
(d) Time:
To express length, mass or capacity using bigger unit, we use decimals.
Finishing time = Starting time + Elapsed time
Note: We count forward to find the finishing time.
Starting time = Finishing time - Elapsed time
Note: We count backwards from the finishing time to find the starting time.
Finishing date = Duration + Starting date
Note: We count forward to find the finishing date.
Starting date = Finishing date – Duration
Note: We count backward to find the starting date.
1 century =100 years =10 decades
1 decade = 10 years
1 year =12 months; 1 month = \[\frac{1}{12}\] year
1 week = 7 days; 1 day = \[\frac{1}{7}\] week
1 day = 24 hours; 1 hour = \[\frac{1}{24}\]day
1 hour = 60 minutes; 1 minute = \[\frac{1}{60}\] hour
1 minute = 60 seconds; 1 second = \[\frac{1}{60}\]minute
On the Celsius scale, freezing point of water is 0 °C and boiling point of water is 100 °C
There are 100 equal divisions on the Celsius scale.
The temperature of a normal human being is 37 °C.
Temperature is measured using a thermometer.
4 A clinical thermometer which shows the temperature in the range of 35 °C to 42 °C is used to measure the temperature of a human body.
Estimation: In real life we estimate measures of length, mass, capacity, time and temperature.
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