Tim mot so co 2 chu so, biet rang khi viet them chu so 4 vao ben trai so do ta duoc mot so gap chin lan so phai tim

 

tim mot so co hai chu so, biet rang neu them chu so 0 vao giua hai chu so do thi ta duoc mot so co ba chu so gap 9 lan so ban dau.

TIM MOT SO TU NHIEN CO HAI CHU SO,NEU BIET,NEU VIET THEM CHU SO 0 VAO BEN PHAI SO PHAI TIM VA MOT CHU SO 1 CHU SO1 VAO BEN TRAI SO DO THI TA DUOC MOT SÔMI BANG50 LAN SO PHAI TIM

tim mot so co hai chu so biet rang neu viet them vao giua so do mot so co hai chu so kem so phai tim 1 don vi thi duoc mot so moi gap 91 laan so phai tim tim hai so

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 

tim mot so co hai chu so biet rang neu viet them chu so 3 vao ben trai so do ta duoc so moi [co 3 chu so } = 5 lan so phai tim

tim mot so co 3 chu so biet rang neu tang chu so hang tram them n don vi giam chu so hang chuc va don vi di n don vi ta duoc 1 so co 3 chu so gapn lan chu so ban dau

 

tim hai so co hieu bang hai tram muoi sau biet rang neu them mot chu so khong vao ben phai so be thi duoc so lonhieu cua hai so bang ba tram chin muoi ba biet rang neu xoa chu so cuoi cua so lon thi duoc so behien nay bo ba mot tuoi con bon tuoi .Hoi bao nhieu nam nua tuoi bo gap bon lan tuoi con

giai nhanh giup minh nhe minh can rat rat gap

tim mot so co hai chu so biet rang neu viet them chu so 3 vao ben trai so do ta duoc so moi ( co ba chu so ) bang 5 lan so phai tim