Các câu hỏi tương tự
muoi bay phan muoi ba chia nam muoi mot phan hai muoi sau chia rut gon
vi du chin phan muoi nhan nam phan sau bang chin nhan 5 tren muoi nhan sau bang ba nhan ba nhan 5 tren nam nhan hai ba nhan hai
1.rut gon roi tinh hai muoi tam phan ba muoi lam nhan cho muoi lam phan bay muoi hai cong cho muoi bay phan bon muoi hai
ba ban mai,thanh,linh co so tien la muoi lam nghin dong. hay tinh so tien cua moi nguoi biet rang mot phan tu so tien cua ban mai bang hai muoi phan tram s tien cua ban thanh va bang mot phan sau so tien cua ban linh
1 .trung binh cong cua hai phan so la 5/12 .neu tang phan so thu nhat gap 2 lan thi trung binh cong cua chung bang 2/3 .tim hai phan so do .
2.trung binh cong cua ba phan so la 13 /36 .neu tang phan so thu nhat gap 2 lan thi trung binh cong cua chung bang 19/36 ,cho biet phan so thu hai lon hon phan so thu ba 1 /12. tim ba phan so do .
a)so thap phan gom hai muoi tam don vi va ba muoi hai phan tram
b)hon so gom ba muoi chin don vi va nam phan muoi hai
muoi bay phan muoi ba chia nam muoi mot phan muoi sau chia rut gon
trung binh cong cua ba so thap phan bang 3,27 . so thu nhat bang3/5 so thu 2 va bang 3/4 so thu ba . tim ba so do
trung binh cong cu ba phan so bang \(\frac{31}{90}\)nếu tang phan so thu 2 gapp 2lan thi trung binh cong cua chung bang \(\frac{23}{45}\)biêt phan so thu hai hon phan so thu ba la\(\frac{2}{15}\)tim phan so thu nhat
trung binh cong 3 so la 5/8 . so thu 1 bang trung binh cong so thu hai va thu ba . so thu ba hon so thu 2 1/4 . tim 3 so duoi dang so thap phan ?