1.rut gon roi tinh hai muoi tam phan ba muoi lam nhan cho muoi lam phan bay muoi hai cong cho muoi bay phan bon muoi hai
1 chia mot phan muoi =
mot phan muoi chia mot phan mot tram=
mot phan mot tram chia mot phan mot nghin=
1 gap ... lan 1/10
1/10 gap ...lan 1/100
1/100 gap ... lan 1/1000
tinh nhanh tong sau 1 phan 2 cong 1 phan 4 cong 1 phan 8 cong 1 phan 10 cong 1 phan 16 cong 1 phan 32 cong 1 phan 64 cong 1 phan 128
1)Viet cac so do sau duoi dang phan so thap phan co :
a) Ten don vi la met
57m, 454dm, 6789cm, 3dm 5cm 7mm
2) Viet so thap phan co :
a) Nam muoi lam don vi,nam phan muoi,nam phan tram,nam phan nghin
b) Hai nghin khong tram linh hai don vi,tam phan tram
c) Khong don vi,mot phan nghin
1) Viet cac so do sau duoi dang so thap phan co :
Ten don vi la met
57mm , 454dm , 6789cm , 3dm 5cm 7mm
2) Viet so thap phan co :
a. Nam muoi lam don vi , Nam phan muoi , nam phan tram , nam phan nghin
b. Hai nghin khong tram linh hai don vi , tam phan tram
c. Khong don vi , mot phan nghin
ba don vi,chin phan muoi
bay chuc , hai don vi , nam phan muoi, bon phan tram
hai tram, tam chuc, chin phan muoi, bay phan tram, nam phan nghin
mot tram,hai don vi,bon phan muoi,mot phan tram,sau phan nghin ( viet so thap phan)
chuyen so thap phan thanh hon so co chua phan so thap phan;
7,9 ; 12,35; 8,06; 72,308; 20,006.
a) Bon don vi, chin phan muoi
b) Hai muoi sau don vi, nam phan muoi, sau phan tram
c) Khong don vi, sau tram hai muoi mot phan nghin
nam don vi va chin phan muoi
bon muoi tam don vi ; bay phan muoi va hai phan tram
ko don vi, hai phan tram
ko don vi,bon tram linh bon phan nghin
ko don vi nam phan nghin