Page 224 - New Medley 2 Semester 1

Monica measured the length of her desk and said it was 5 handspans
long.

When the teacher measured them, she found that

they were 4 handspans. Then Monica asked the
teacher what the actual length was. The teacher
explained that the actual length can be found

using standard units of length.

The centimetre and the metre are the standard
units of length.

Centimetre

1 cm
A centimetre is used to measure short lengths such 1 cm

as lengths of a pen, a pencil, a brush, a chalk, etc. This is one cm.

In the short form, centimetre is written as cm.

The ruler in a geometry box is 15 cm long. It is used to measure the
length of several items.

cm
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
inches 0
4
3
2
5
1
6

Length of a chalk Length of a duster Length of a pencil
is about 7 cm. is about 15 cm. is about 12 cm.

Measuring Length

We can measure a pencil using the 15 cm long ruler or scale.

cm
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
inches 0
3
1
2
4
5
6
Step 1: Put one end of the pencil on 0 (starting point).
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