cac so thap phan lap duoc la: 1,79; 1,97; 7,19; 7,91; 9,17; 9,,71.

Nhu vay, ta co the lap duoc 6 so thap phan co ba chu so khac nhau va co hai chu so o phan thap phan.

tong so phan bang nhau la:

       2+3=5 ( phan )

chieu rong cua manh vuon la:

         ( 65 : 5) nhan 2 = 26( m)

chieu dai cua manh vuon la:

        65 - 26 = 39 (m)

     dap so:Chieu dai: 39 m;

                 Chieu rong: 26 m.

a) sap xep cac so thap phan theo thu tu tu lon den be: 8,071;8,01;7,801;7,18

b) lam tron so thap phan 7,18 den hang phan muoi, ta duoc so 7,2

a) 114 phan 42 + 35 phan 42 = 149 phan 42

b) 17 phan 6 - 12 phan 6 = 5 phan 6

c) = 63 phan 10

d) 11 phan 7 nhan 21 phan 22 = 3 phan 2

a) <

b) >

c) =

4 va 5 phan 6, 2 va 3 phan 8

ke ve canh ma thoi cha me chung ta con be

em thich canh dan co trang co chan dung tren bo ruong.