Câu hỏi 6Tính $(46-\frac 18)\times\frac 18+(43-\frac 18)\times\frac 18+\cdots+(1-\frac 18)\times\frac 18$.$44\frac{25}{64}$$45\frac{27}{64}$$46\frac{3}{32}$$46\frac{9}{16}$$46\frac34$