so gom 15 trieu 3 van 9 nghin 7 tram 5 don vi viet la

so gom 20 van,ab tram va c don vi

so gom 6 tram , 5 van va 6 chuc duoc viet la .................................

.................................................................................................
 

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

tim tat ca cac so chinh phuong gom 4 chu so biet rang khi ta them 1 don vi vao chu so hang nghin them 3 dom vi vao hang tram them 5 don vi vao hang chuc them 3 don vi vao hang don vi ta van co 1 so chinh phuong

hay viet so tu nhien co so tram la 195 so chuc la 20 va so hang don vi la 7

khi chia mot so tu nhien gom 3 chu so giong nhau cho mot so tu nhien gom 3 chu so khac nhau ta dc thuong la 2 va con du neu xoa mot chu so o so bi chia va xoa mot chu so o so chia thi thuong van bang 2 va so du giam 100 don vi tim so bi chia va so chia

so thap phan gom 3 don vi va 7 phan muoi don vi viet la

     AI TRA LOI NHANH MINH TICK CHO NHA

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