1. 3 tấn 45 kg < 345 yến

14 dam^2 2m^2 < 152m^2

a) x = 1

b) x = -1

9. Writes

10. Am not needing

5. Best

6. Take - is raining

3. Youngest

4. Quieter

2. Smallest

1. Height

b) 2xy(1+z)

d) 33x^2

f) (x-2y)(3x+y)

1-1/10=9/10

3. Be careful with what you eat and drink or you may have an allergy.