3-digit numbers
Numbers to 1000: showing them with base-ten blocks, and seeing that 10 tens make a hundred; the hundreds, tens and units places, and reading and writing the numbers; comparing and ordering them; odd and even numbers; counting in 20s, 25s, 50s and 100s; and estimating how many objects there are.
Key words
| Chinese | English |
|---|---|
| 百位 | hundreds place |
| 十位 | tens place |
| 個位 | units place |
| 數粒 | base-ten blocks |
| 估計 | estimate |
The 5 short lessons and the chapter test
Lessons are in Chinese for now.
- 三位數
- 百位、十位和個位
- 比較和排列
- 單數、雙數和數數
- 估計和重溫
- 章節測驗 (chapter test)
Sample questions (in Chinese)
Question 1數粒表示的數是多少?
數粒表示 。
Answer and explanation
答案:數粒表示 353。
為甚麼?1 塊百是 100,1 條十是 10,1 粒一是 1。3 塊百是 300、5 條十是 50 和 3 粒一是 3,合起來是 353。
Question 2843 怎樣讀?
- 八千零四十三
- 八百五十三
- 八百四十三
- 八百三十四
Answer and explanation
答案:C.八百四十三
為甚麼?843 讀作「八百四十三」。
Question 3813 的數字「3」表示多少?
表示 。
Answer and explanation
答案:表示 3。
為甚麼?813 的「3」在個位,表示 3 個一,即是 3。
Question 4199 ○ 194
○ 內應填上哪個符號?
- >
- =
- <
Answer and explanation
答案:A.>
為甚麼?由最高位開始比較。百位和十位的數字相同;個位:9 大於 4。所以 199 大於 194,寫作 199 > 194。
Based on learning unit 2N1 of the Education Bureau’s Primary Mathematics Curriculum (2017).