20 :2²-5⁹:5⁸

=20:4-5

=5-5

=0

\(\left(5^{19}\div5^{17}-4\right)\div7\)

\(=\left(5^2-4\right)\div7\)

\(=\left(25-4\right)\div7\)

\(=21\div7\)

\(=3\)

1. my cold is.better..........today than it was yesterday. (good)

2.the weather today is .hotter.........than it was yesterday. (hot)

3.chinese bicycles are...worse..........than japanese ones. (bad)

4.mathematics is ...more difficult................than english.(difficult)

5.ho chi minh is the ...biggets...............city in viet nam. (big)

6. he drives..more careful................than his friend. (careful)

7. she sings..most beautiful.............in this school.(beautiful)

8. i read..slower..........than my sister.(slow)

9.grace is..the .oldest..................girl in our class.(old)

10.this exercise is ..easier...........than that one. (easy)

11. he is twice.as fat..........as you.(fat)

12.nam is .the most noisy...............student of all.(noisy)

jane will play ches after she finishes (finish) school.

316-x=-39 -(-19)

316-x= -20

x=316-(-20)

x=336

1.It was a green shirt with white flowers..on...it

sai rồi bn 5⁰=1

Ma Kết .