nửa chu vi sân chơi là:

240:2=120(m)

tổng chiều dài,rộng của sân chơi đó chia được số phần là:

2+3=5(phần)

1 phần dài số mét là:

120:5=24(m)

chiều rộng sân chơi là:

24+24=48(m)

chiều dài sân chơi là:

120-48=72(m)

đáp số:chiều rộng 48m

           chiều dài 72m

a)178,9;17,89;1,789;1,709

b)1,71

-91/24

-11/8

-198/231

-15/56

a)0,5

b)0,891

c)3,09

-2 và 3/4

-3 và 1/2

1.it's Emma's

2.go along the library and turn right

3.they're besite the window 

4. we plant tress

-last yesterday,i was at home.

-the weather was sunny.

-in the morning,i played badminton with my brother. 

-at noon,i helped my mother with the cooking.

-in the afternoon,i watched a funny film.

-i was very happy.

1.I like go for a walk

2.I like read books

3.I'd like to be a gardener

4.Yes,we were

5.We play chess

1.It'on the ground floor

2.Tony likes solve maths problems

3.Yes,they did

4.They campsite

5.It's Ben's

1.It'on the ground floor

2.Tony likes solve maths problems

3.Yes,they did

4.They campsite

5.It's Ben's