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E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_08
\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Fill in the missing numbers in the blanks to make the statement correct.
1. 3 m 5 cm = ______cm

2. 225 kg = ______g
3. 4 L 45 mL = _____ cL

4. 32 m 75 cm + 8 m 25 cm = _____ m ____cm
5. 440 kg 430 g – 275 kg 288 g = _____kg ____g
6. If 8 L of milk is distributed among children out of 11 L 500 mL, then the amount of
milk left is _______mL.

METRIC MEASURES

In the previous class, we have learnt that the metre,

gram and litre are the standard units of length, Knowledge Desk
weight and capacity, respectively. In science, mass is the amount of
‘stuff’ in an object, while weight is
There are other units of metric measures (length, the force of gravity on that mass.
weight and capacity used to measure smaller lengths, On the moon, your mass is the

weights and capacities as well as to measure larger same, but your weight is less. For
everyday use on Earth, we often
lengths, weights and capacities. use the terms interchangeably.

Metric measures Standard unit Units of metric measures used in daily life
Length metre km, m, cm, mm

Weight (mass) gram kg, g, mg

Capacity litre L, mL

We put different prefixes to the standard units of metric measures. The most commonly
used prefixes are ‘kilo’, ‘hecto’ and ‘deca’ for higher units and ‘deci’, ‘centi’ and ‘milli’ for

lower units.
There is a relationship among the various units of metric measures. The table that follows

shows the relationship between different units of measurement and can be understood
using the place value chart.

Knowledge Desk

The Story of the Metre
Where did the metre come from? After the French Revolution, scientists wanted a standard
unit of measurement for everyone. In the 1790s, they defined one metre as one ten-millionth
of the distance from the North Pole to the Equator. They even made a platinum-iridium bar
of this exact length to serve as the world’s official metre.

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