23 cm + 312 cm = 335 cm
cần cù
2c
3b
4a
5d
Scientist have not found life on Mars yet
38A
39C
40B
75/2 = 75 x 5/2 x 5 = 375/10 = 37,5
1B
2C
3D
4B
5A
6A
7C
8B
9D
a. 14/15
b. 1/20
c. 4/7
d. 49/90