1. tim so tu nhien co 3 chu so,biet so do gap 20 lan tong cac chu so cua no
2. tim so tu nhien co 2 chu so, biet rang neu lay so do chia cho hieu cua chu so hang chuc va hang don vi, thi ta duoc thuong la 28 du 1
3. tim 1 so tu nhien co ba chu so , biet rang neu chuyen chu so cuoi len truoc chu so dau ta duoc so moi hon so da cho 765 don vi
tim so chia cua mot phep chia , biet rang : so bi chia 410, so du bang 19
a) tim mot so co hai chu so va neu lay so do chia cho chu so hang don vi thi duoc thuong la 8 va du 7
b) tong cua hai so bang 196 . tim hai so do
c)tim so co 3 chu so , biet rang neu viet them mot chu so 3 vao ben phai so do thi no tang them 2217 don vi
Cho 2 phan so co tong bang -3 va tich bang 12/5. Tinh tong cac so nghich dao cua 2 phan so do
tim so tu nhien co bon chu so biet rang so do co the phan tich thamh tich cua hai thua so co tong bang 100 va mot trong hai thua so ay co dang a^a
cho phan so co tong bang -3 va tich bang 12/5 ting tong nghich dao cua 2 phan so do?
tim so co 2 chu so biet 3 lan so do bang binh phuong 1 tong cac chu so cua so do va bang 4 lan tong cac chu so do
tim 1 so tu nhien co 3 chu so biet rang so do chia cho tong chu so cua no = 39
Tim 1 so tu nhien co 3 chu so , biet rang neu láy so do chia cho tong cac chu so cua no thi duoc thuong la 11
tim so tu nhien co 3 chu so ,biet rang so do gap 20 lan tong cac chu so cua no