Violympic toán 6
Các câu hỏi tương tự
cho mot so tu nhien va mot so thap phan co tong bang 2032,11 .Bo dau phay cua so thap phan di thi tong se bang 4023 .Tim so thap phan do.Tra loi: So thap phan do la........
cho phan so a/b khac 0, toi gian.biet rang neu cong ca tu so va mau so voi tu so cua phan so cua phân so da cho thi duoc phan so moi bang mot nua phan so da cho.khi do gia tri cua hieu a-b la..........................................
tim so co 3chu so biet rang chu so hang don vi bang 1 phan 5 chu so hang tram va bang 1phan 4 chu so hang chuc .
chung minh rang hieu cua 2 phan so toi gian la 1 so nguyen thi 2 phan so co mau bang nhau hoac doi nhau
tong ket nam hoc ket qua xep loai hoc sinh lop 5a chia lam 3 loai gioi kha va trung binhso hoc sinh gioi bang 1/2 so hoc sinh kha = 1/3 so hoc sinh trung binh tim so hoc sinh moi loai biet so hoc sinh lop 5a la 1 so lon hon 30 nho hon 40
Tim so bi tru, biet hieu cua hai so bang so tru va so bi tru lon hon so tru la 26.
Dap an : ......................
tim so tu nhien x biet rang so lon la 270 tim so nho
1.goi A la tap hop cac so tu nhien co 2 chu so chia het cho 5 .Tong cac phan tu la:
2Gia tri nho nhat cua bieu thuc A=(x^2+2)^2 la
tim 2 so tu nhien lien tiep co tich bang 600.