tim so co ba chu so biet rang neu doi chu so hang tram va don vi cua no cho nhau thi gia tri cua no khong thay doi con chu so hang chuc bang mot phan ba tong hai chu so kia

1 ,Tim so co 4 chu so biet chu so hang tram gap doi chu so hang chuc , chu so hang chua gap 3 lan chu so hang don vi 

2, Tim 1 so co 2 chu so , biet neu so do chia cho chu so hang don vi cua no thi dc thuong = 6 va du 5

3,Tim so co 4 chu so biet neu xoa chu so hang chuc thi so do giam di 1188 don vi

4, Tim so co 3 chu so neu so do cong voi tong cac chu so cua no thi = 555

            Giai Han Ra Nhe !

.

tim so co 4 chu so chia het cho 2,3 va 5 biet rang khi doi cho cac chu so hang don vi voi hang tram hoac hang chuc voi hang nghin thi so do khong thay doi

tim mot so tu nhien co ba chu so biet rang neu tang chu so hang tram len n don vi va giam chu so hang chuc di n don vi thi ta duoc so co chu so gap n lan chu so da cho

Tim mot do tu nhien co 3 chu so abc biet rang neu doi chu so hang tram va chu so hang don vi cho nhau thi so moi lon hon so cu 792 đơn vị ,chu so hang don vi gap 3 lan chu so hang chuc

 1. Tim tat ca cac so co 2 chu so sao cho moi so gap 2 lan tich cua no?

2. Tim so nguyen to co 3 chu so biet rang neu viet so do theo thu tu nguoc lai thi ta duc 1 so la lap phuong cua 1 so tu nhien?

3. Tim so tu nhien co 4 chu so biey chu so hang nghin bang chu so hang don vi chu so hang tram bang chu so hang chuc va so do viet duoc duoi dang tich cua 3 so nguyen to lien tiep?

tim cac so co hai chu so , biet rang neu lay chu so hang chuc nhan co chu so hang don vi chia cho 3 thi bang hieu cua chu so hang chuc va 1

tim so co 2 chu so biet chu so hang chuc gap 3 lan chu so hang don vi va neu doi cho cho nhau thi so do giam di18 nhan tien thay giai cho em voi ma

 em hoc lop 4

cho mot so co 3 chu so:

chu so hang don vi hon chu so hang chuc la 2 don vi.

chu so hang chuc kem chu so hang tram la 1 don vi

hoi neu doi chu so hang don vi va hang tram cho nhau thi so da cho tang hay giam bao nhieu don vi