ai tra loi nhanh nhat ma co ca loi giai thi minh se tink cho nhe
đổi:2,25=225/100=9/4
tổng mới là:702+11+15=728
số lớn mới là:728:(9+4)x9=504
số lớn cũ là:504-15=489
duyệt nhé
tim 2 so tu nhien co hieu la 45 biet rang neu them vao so lon 15 don vi va giam so be di 8 don vi thi duoc 2 so moi co thuong bang 5
Bai 1 : Tong cua hai so la 2000. Neu so hang thu nhat them 135 don vi va so hang thu hai bot 531 don vi thi duoc tong moi la bao nhieu?
Bai 2 : Tim tong hai so biet rang neu so hang thu nhat bot di 246 don vi va so hang thu hai them 642 don vi thi duoc tong moi bang 2010.
Bai 3 : Hieu cua hai so la 1000. Neu so lon them 235 don vi va so be bot 200 don vi thi duoc hieu moi la bao nhieu?
Bai 4 : Hieu cua hai so bang 1234. Neu so lon bot 234 don vi va so be them 456 don vi thi duoc hieu moi la bao nhieu?
Bai 5 ; Tim hieu cua hai so, biet rang so lon va so be cung bot di 100 don vi thi duoc hieu moi la 1000.
tim 2 so biet tong cua chung = 257 va neu them vao so lon 13 don vi so be 9 don vi thi duoc 2 so moi co ti so = 1,25 tim so
aj nhanh to so t chi that nhjeu
tim 2 so co tong cua chung la 257 va neu them vao so lon 13 don vi, so be 9 don vi thi duoc hai so co ty la 1,25
hai so co tong bang 1983. Neu them vao so be 24 don vi thi se duoc so moi bang 4/5 so lon . Tim so be
tong cua 2 so tu nhien la 630.tim so be biet neu bót so be di 19 don vi va them vao so lon 19 don vi thi so be bang 3/4 so lon
hai so co tong la 57,3 neu them vao so lon 2,5 don vi va bot o so lon di 1,2 don vi thi duoc 2 so co tong la 79,8
hieu hai so la 6,9tim hai so do biet rang neu them vao so be 2,5 don vi va bot o so lon di1,2 don vi thi duoc hai so co tong la 79,8
tim 2 so tu nhien co hieu la 45 nau them vao so lon 15 don vi va bot so be di 8 don vi thi duoc 2 so co thuong moi la 5 tim 2 so do
