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bai 4 viet tat ca cac so co ba chu so ma chu so hang tram va chu so hang don vi deu bang 1 :
viet tat ca cac so co hai chu co tong cua chu so hang chuc va chu so hang don vi la 8
viet so co ba chu so biet chu so hang tram la 1 chu so hang chuc hon chu so hang tram 2 don vi nhung kem chu so hang don vi 3 don vi
BAI1 TIM SON CO 3 CHU SO MA TONG CAUA HANG CHUC BANG 1/3 CHU SO HANG DON VI VA GAP DOI CHU SO HANG TRAM . BIET SO HANG CHUC LA 2 BAI2 CHO CAC SO 2,5,3,7. HAY VIET TAT CA CAC SO CHAN CO3 CHU SO KHAC NHAU TU CAC SO TREN. BAI3 TIM MOT SO CO 3 CHU SO . BIETCHU SO HANG TRAM GAP DOI...
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BAI1 TIM SON CO 3 CHU SO MA TONG CAUA HANG CHUC BANG 1/3 CHU SO HANG DON VI VA GAP DOI CHU SO HANG TRAM . BIET SO HANG CHUC LA 2 BAI2 CHO CAC SO 2,5,3,7. HAY VIET TAT CA CAC SO CHAN CO3 CHU SO KHAC NHAU TU CAC SO TREN. BAI3 TIM MOT SO CO 3 CHU SO . BIETCHU SO HANG TRAM GAP DOI CHU SO HANG CHUCVA CHU SOHANG CHUC GAP CHU SO HANG DON VI
em hay tim so co ba chu so ma hieu cua chu so hang tram va chu so hang chuc la 0 con hieu cua chu so hang chuc va chu so hang don vi bang 9
Tim so co 3 chu so biet hieu cua chu so hang tram va hang don vi bang o,hieu cua chu so hang chuc va don vi bang 8
tim so be nhat co hai chu so ma tich va thuong cua chu so hang don vi voi chu so hang chuc bang deu bang 3
co bao nhieu so co 3 chu so khac nhau ma tong cac chu so hang tram va hang chuc bang 5
Viet so co ba chu so, trong do chu so hang don vi nhan 2 duoc chu so hang chuc, chu so hang chuc nhan 2 thi duoc chu so hang tram