Volume (II)
The links 1 cm³ = 1 mL, 1000 cm³ = 1 L and 1 m³ = 1000 L; reading volumes on a measuring cup; the capacity of a cuboid container and the volume of water in it; finding the volume of an irregular solid by displacement, from the rise in the water level or the water that overflows; when displacement works (the object must sink completely and must not float or dissolve); and word problems.
Key words
| Chinese | English |
|---|---|
| 容量 | capacity |
| 體積 | volume |
| 毫升 | millilitre (mL) |
| 升 | litre (L) |
| 量杯 | measuring cup |
| 排水法 | displacement method |
The 8 short lessons and the chapter test
Lessons are in Chinese for now.
- 立方厘米和毫升
- 升和立方米
- 量杯和容器的容量
- 水的體積
- 排水法
- 溢出的水
- 排水法的注意事項
- 應用題
- 章節測驗 (chapter test)
Sample questions (in Chinese)
Question 1填上空格。
720 cm³ = L
Answer and explanation
答案：720 cm³ = 0.72 L
為甚麼？1000 cm³ = 1 L，所以 720 cm³ = 720 ÷ 1000 L = 0.72 L。
Question 2量杯中的水有多少立方厘米？
cm³
Answer and explanation
答案：600 cm³
為甚麼？水位對準 600 mL 的刻度。1 mL = 1 cm³，所以是 600 cm³。
Question 3一個長方體水缸的內部長 20 cm，闊 40 cm，高 50 cm。它的容量是多少升？
L
Answer and explanation
答案：40 L
為甚麼？容量 = 20 × 40 × 50 = 40000 cm³。1000 cm³ = 1 L，所以容量是 40000 ÷ 1000 = 40 L。
Question 4水缸內的水深 45 cm。水缸內有多少升水？
L
Answer and explanation
答案：112.5 L
為甚麼？水的體積 = 50 × 50 × 45 = 112500 cm³ = 112.5 L。
Based on learning unit 6M2 of the Education Bureau’s Primary Mathematics Curriculum (2017).