HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
60+4=64
k nha
Số lớn là 287 nhé
k cho mk nha!!!!!!!!
Thank you very much
123456789+987654321+102349875=1213460985
LƯU Ý
Các bạn học sinh KHÔNG ĐƯỢC đăng các câu hỏi không liên quan đến Toán, hoặc các bài toán linh tinh gây nhiễu diễn đàn. Online Math có thể áp dụng các biện pháp như trừ điểm, thậm chí khóa vĩnh viễn tài khoản của bạn nếu vi phạm nội quy nhiều lần.
Chuyên mục Giúp tôi giải toán dành cho những bạn gặp bài toán khó hoặc có bài toán hay muốn chia sẻ. Bởi vậy các bạn học sinh chú ý không nên gửi bài linh tinh, không được có các hành vi nhằm gian lận điểm hỏi đáp như tạo câu hỏi và tự trả lời rồi chọn đúng.
Mỗi thành viên được gửi tối đa 5 câu hỏi trong 1 ngày
Các câu hỏi không liên quan đến toán lớp 1 - 9 các bạn có thể gửi lên trang web h.vn để được giải đáp tốt hơn.
HIHI DUOC DUYET ROI
giải
cạnh ab dai la :
72:(3+4+5)=18(cm)
cạnh ac dài là :
18:3/4=24(cm)
diện tích hình tam giác abc là :
24*18:2=216
Đáp số:216cm vuông
10. My sister (collect)__________has collected___________stamps for ten years. 11.My family (live)_______________has lived_________in Bac Giang city for ten years 12. Maryam and I enjoy ( go)_______going_________ to the park on summer evenings
13. Be quiet! Somebody (sing) _________is singing____________beautifully 14. Nam likes (chat)___________chatting____________on the Internet in his free time. 15. I (not see) ______________haven't seen_____________ this film yet. 16. Mrs Lan (not teach)_____________hasn't taught___________ in this school since 1998. 17. They enjoy(chat) __________chatting_________They use the Internet very often. 18. It started to rain when we (watch) ________were watching_____________ TV. 19. They ( paint)____________are painting________new hotel yellow at the moment. 20. I (not wear) ___________haven't worn____________that suit since my sister married. III. Rewrite the sentences so that it means the same as the first one, beginning With the words given. 1. “ Do you listen to music frequently ?” she asked me. She asked me……………………if i listened to music frequently……………………………………. 2. Why don’t we use banana leaves to wrap food ?. I think …………………we should use banana leaves to wrap food………………………………………… 3. They planted this tree many years ago. This tree ……………………………was planted many years ago………………………………………… 4. I’m sorry, I don’t know her phone number. I wish …………………………………i knew her phone number……………………………………… 5. “ Where do you come from, Ba? Liz said. Liz wanted to know…………………where Ba came from………………………………… 6. I often played soccer when I was a child. I used to ………………………play soccer when i was a child………………………………………. 7. What a pity ! I can’t speak English well. I wish …………………………………i could speak english well……………………………………. 8. Their team doesn’t play very well. They wish…………………………their team played very well………………………………………… 9. “ Why do you have to do this work ?” She asked me. She asked me ……………………………why i had to do this work…………………………………. 10. They will open the National stadium next Sunday. The National stadium ……………………………will be opened next sunday………………………… 12. “ Why are you standing here ?” He asked her. He wanted to know ……………………………why she was standing there……………………………. 13. “ How often do you go to the English club ?”, Ba asked Tam. Ba asked ………………………………Tam how often she went to the english club…………………………………….. 14. She last wore that dress at her sister’s wedding. She hasn’t…………………………worn that dress at her sister"s wedding…………………………………………. 15. They built the church in 18 th century . The church ……………………………was built in 18th century……………………………………… 16. “ where are you working now, Nam ?” asked Ha. Ha wanted to know …………………………where Nam was working then……………………………….. 17. They were built two department stores since 2007. Two department stores …………………………were been built since 2007……………………………. 18. They built this hotel six months ago. This hotel …………………was built six months ago……………………………………….. 19. “ Can you speak English ?” , Mrs Minh asked . Mrs Minh asked me ……………………………if i could speak english……………………………. 20. “ Do you speak other language , Mai ?” the teacher said. The teacher wanted to know ………………………if Mai spoke other language…………………………
Ta gọi A = n^4
=> A = 2n^2
Vậy A là một số chính phương