60
UNIT 6
Objects
The centimetre, cm
Activity 3
Try These
To measure the length of small objects, a smaller unit is used.
A smaller unit is the centimetre.
The symbol for centimetre is cm.
The ruler used in class has the unit cm.
Now, use your ruler to measure and record the lengths of some objects in the table below.
Object Length in cm
Mathematics book
Copybook
Pencil
Pencil case
Eraser
2. Use your ruler to draw lines of the following lengths.
(a) 3 cm
(b) 8 cm
(c) 5 cm
1 cm
Note to Teacher
Materials needed: 30 cm
ruler, or shorter.
Some objects are less
than 30 cm in length,
e.g.,copybook, books,
pencil case.