Length and distance (II)
Length and distance (II)
Let's learn to measure, compare, and solve problems with centimetres!
What We Will Learn:
- Recognise centimetre (cm) as a unit of measurement
- Measure and compare lengths and distances in centimetres
- Estimate measurements with everyday rulers
Understanding Centimetres
What is a Centimetre? 什麼是厘米？
A centimetre (cm) is a small unit of length. It's about the width of your little finger.
厘米是一種測量長度的小單位。它大約是你的小指頭寬。
Interesting fact! 有趣的事實！
There are 100 centimetres in 1 metre.
1米等於100厘米。
Centimetres on a Ruler 尺上的厘米
On a ruler, centimetres are marked with numbers. Each number shows how many centimetres from the start.
在尺子上，厘米用數字標記。每個數字顯示與起點相距多少厘米。
Each small line between the numbers represents 1 millimetre (mm). There are 10 millimetres in 1 centimetre.
數字之間的每個小線代表1毫米。1厘米等於10毫米。
Try This! 試試看！
Find a ruler and practice measuring small objects around you!
找一把尺子，練習測量你周圍的小物件！
Real-life Examples 生活中的例子
Many everyday objects can be measured in centimetres. Click on each object to learn more!
許多日常物品可以用厘米測量。點擊每個物品了解更多！
Pencil
15 cm
Ruler
30 cm
Book
25 cm
Eraser
4 cm
Paper Clip
3 cm
Finger Width
1 cm
Did You Know? 你知道嗎？
In Hong Kong, people commonly use centimetres to measure:
在香港，人們常用厘米來測量：
- Height of children 兒童身高
- Length of school supplies 學校用品的長度
- Size of toys 玩具的大小
- Size of furniture 家具的尺寸
How to Use a Ruler 如何使用尺子
- Line up the 0 mark with one end of the object you want to measure.
- 將0刻度與您要測量的物體的一端對齊。
- Keep the ruler straight.
- 保持尺子筆直。
- Look at the number on the ruler where the other end of the object ends.
- 看尺子上物體另一端所在的數字。
- That number tells you how many centimetres long the object is.
- 該數字告訴你物體有多少厘米長。