user-avatar
nguyenduong
2 năm trước
a) Để viết được các số tự nhiên từ 1 đến 99 cần bao nhiêu chữ số 5 ? b) Để viết được các số tự nhiên từ 100 đến 999 cần bao nhiêu chữ số 9 ? c)Khi viết tất cả các số tự nhiên từ nhiên từ 1 đến 100 thì chữ số 1 được viết bao nhiêu lần ?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

I. Mark the letter A, B, C or D to indicate the correct option to fill each of the following blanks. 1. Our seats were ____far from the stage that we couldn't see the actors and actresses clearly. A. very B. too C. enough D. so 2. He was _____ he never washed his clothes by himself. A. too lazy B. so lazy that C. very lazy that D. such lazy that 3. They are _____ young _____ drive the car. A. so / that B. too / to C. enough / to D. not only / but also 4. It was _____ a boring speech that I felt asleep. A. such B. so C. very D. too 5. Is there _____ for everyone? A. food and drink enough B. enough food and drink C. enough of food and drink D. enough food and drink enough 6. He was _____ he could not continue to work. A. very tired that B. such tired that C. too tired that D. so tired that 7. John’s eyes were _____ bad that he couldn’t read the number plate of the car in front. A. such B. too C. so D. very 8. - Why don’t we make a fire? - It’s not cold _____ to make a fire. A. too B. enough C. such D. much 9. Most of the pupils are _____ to pass the examination. A. enough good B. good enough C. too good D. very good 10. You can send me a letter if you want to, but your phone call is _____ for me. A. enough good B. good as enough C. good enough D. good than enough 11. Davis has _____ many patients _____ he is always busy. A. too / that B. very / until C. such / that D. so / that 12. It was _____ a difficult question that they couldn't explain. A. so B. such C. very D. too 13. The lesson _____ for me to understand. A. is very difficult B. too difficult C. difficult too D. is too difficult 14. The tent show is _____ for us to see. A. enough interesting B. very interesting C. interesting enough D. interesting 15. They are _____ that they can't buy a bicycle. A. enough poor B. poor enough C. so poor D. too poor

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team