1,。

(1)80:60 4:3 three quarters

(2)4 12 point 5 50 16

(3) 2 5 65 438+08 65 438+05 0.4% 40 40%

A: 5 B: 3

(5)8 9

Half past zero.

16

[6] Seven thirds.

(7)60 cm

(8) 15

2. Right or wrong

Three questions, 3,2, 1, 3,3

4,4 to 7 1 to 150

1 to 1 9 to 4

6 5438+0 to 6 5 to 8

Five, two-thirds, two-thirds

One twentieth of 42

Page 5 1:

Six, four, twenty-seven

Sixteen, fifteen, six fifths.

7, (1) is proportional.

200 divided by 60 equals 10/3 (hour)

3: 5 times 60 equals 2 10 (km).

A:

8, (1) 1 is 40000.

(2) One is 800 meters apart and the other is 1000 meters apart.

9. Six squares are long and three squares are wide.

10, and the solution height is x.

1.2:2.4=x:20

2.4x= 1.2 times 20

x= 10

A:

1 1, 6 times 5000000 = 3000000(cm)= 300km.

2 plus 3=5

300 times two fifths = 120km.

A:

12, (12 minus 7) divided by (18 minus 8) =1/2cm.

12 plus 8 times and a half = 16 cm.

A:

I worked hard. ...