user-avatar
hoangyen140301
2 năm trước
4,9 × 3,3 – 4,8 × 3,3 + 33 1 điểm 363 36,3 33,6 3,63 Một nền căn phòng hình chữ nhật được lát kín bằng 80 tấm gạch hình vuông có cạnh 5dm. Tính diện tích nền nhà đó theo đơn vị mét vuông. 1 điểm 4000m2 4000dm2 40m2 40dm2 Một hình thang có tổng độ dài hai đáy là 10,8dm ; chiều cao là 75cm. Diện tích của hình thang đó là …………………… dm2. 1 điểm 450cm2 450 dm2 40,5 cm2 40,5dm2
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mn giúp t làm bài này vs 1. Why don’t you arange for someone to fix your motorkike? ->Why don’t you get ......................................... 2. ______ not to miss the 15; 30 train, the manager set out for the station in a hurry. A/ To remind B/ Reminded C/ Being reminding D/ Reminding 3. _______ at school yesterday when we were informed that there was no class due to a sudden power cut. A/ We have hardly arrived B/ We had arrived hardly C/ Hardly we had arrived D/ Hardly had we arrived 4. Changes have been made in our schooling program. As a result, young children _____ do homework any more. A/ haven’t B/ oughtn’t C/ needn’t D/ couldn’t 5.The headmaster has decided that three lecture halls ___ in our school next semesester. A/ will be building B/ will build C/ are being built D/ will be built 6.Because Coronavirus disease spreads through close contact with sick people and through the air, we should avoid ______ to crowwed places. A/ having gone B/ going C/ to go D/ gone 7. The young girl has great experience of nursing. She has worked as a hospital volunteer for years. A/ Before she worked as a hospital volunteer for years, the young girl has great experience of nursing. B/ Much as she has worked as a hospital volunteer for years, the young girl has great experience of nursing. C/ Having worked as a hospital volunteer for years, the young girl has great experience of nursing. D/ With great experience of nursing, the young girl has worked as a hospital volunteer for years. 8. Not until all their demands had been turned, _______ to go strike for more walfare. A/ did the workers decide B/ the workers worked C/ do the workers decide D/ have the workers decided 9. The bank robbers wore the masks in order to avoid _______ by security cameras. A/ to be watched B/ being watched C/ watching D/ having watched 10. It was not until he failed the exam, _____________________ . A/ that he realised how important the revision was. B/ when he realises how important the revision is. C/ that he realises how important the revision is. D/ when he realised how important the revision was. 11. This letter _________ . Can you see that tear on the envelope? A/ might open B/ might have been opened C/ might be opened D/ must open 12. Lung cancer and other diseases can ______ to cigarette smoking. A/ trace B/ tracing C/ be traced D/ be tracing

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