5-digit numbers
Numbers with five digits: ten thousands make one ten thousand, and what the digit in the ten thousands place means; reading and writing them, and counting on or back from a given number (such as from 9990 to 10 000); telling odd from even by the units digit; and comparing numbers with =, > and <.
Key words
| Chinese | English |
|---|---|
| 五位數 | 5-digit number |
| 萬位 | ten thousands place |
| 大於 | greater than (>) |
| 小於 | less than (<) |
| 單數 | odd number |
| 雙數 | even number |
The 4 short lessons and the chapter test
Lessons are in Chinese for now.
- 萬和讀數
- 萬位和數的組成
- 數數、單數和雙數
- 比較、排列和砌數
- 章節測驗 (chapter test)
Sample questions (in Chinese)
Question 1位值表表示的數是多少?
Answer and explanation
答案:74316
為甚麼?萬位 7 粒、千位 4 粒、百位 3 粒、十位 1 粒和個位 6 粒,所以是 74316。沒有圓粒的位要寫 0。
Question 284300 怎樣讀?
- 八萬五千三百
- 八萬四千三百
- 八百四十三
- 八萬四千四百
Answer and explanation
答案:B.八萬四千三百
為甚麼?84300 讀作「八萬四千三百」。末尾的 0 不用讀出來。
Question 381365 的數字「5」表示多少?
表示 。
Answer and explanation
答案:表示 5。
為甚麼?81365 的「5」在個位,表示 5 個一,即是 5。
Question 4倒數,每 1 個一數,填上空格。
90001、90000、89999、89998、
Answer and explanation
答案:90001、90000、89999、89998、89997
為甚麼?每次少 1:90001、90000、89999、89998、89997。
Based on learning unit 3N1 of the Education Bureau’s Primary Mathematics Curriculum (2017).