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1b
2d
3d
4c
5c
6d
25c
26a
27b
28a
29b
30b
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1 d -> easily
2. die -> death
3. occasional -> occasionally
4. shame -> shy
5. instruct -> instruction
6. science -> scientific
7. please -> pleasure
8. sadness -> sad
9. national -> nations
10. courage -> encourages
11. equal -> equality
12. industry -> industrial
13. automatic -> automatically
14. manufacture -> manufactured
15. consequence -> consequently
16. rich -> enrich
17. disappointing -> disappointed
18. apparent -> apparently
19. financial -> finance
20. extinction -> extinct
7 b
8 a
9 c
10 c
11 c
12 b
13 c
14 d
15 c
16 d
17 a
18 c
19 d
20 c
21 b
22 a
23 d
24 b
12
7 more slowly than
8 better than
9 more quickly
10 more powerful than
11 more easily
12 harder
13 more carefully
14 better than
15 more frequently than
16 more than
Bài 2
1 more carefully
2 more slowly
3 ko có từ để điền
4 more often
5 earlier
6 farther
7 reliable
8 more peacefully than
9 more easily
10 better
11 worse
12 more quiet
13 more quiet
14 bigger
1 Tính:
1) \(\frac{2}{5}\)\(+\)\(\frac{7}{3}\)
\(=\)\(\frac{6}{15}\)\(+\)\(\frac{35}{15}\)
\(=\)\(\frac{41}{15}\)
2) \(\frac{6}{5}\)\(-\)\(\frac{2}{3}\)
\(=\)\(\frac{18}{15}\)\(-\)\(\frac{10}{15}\)
\(=\)\(\frac{8}{15}\)
c) \(\frac{7}{12}\)\(+\)\(\frac{4}{15}\)
\(=\)\(\frac{35}{60}\)\(+\)\(\frac{16}{60}\)
\(=\)\(\frac{51}{60}\)
\(=\)\(\frac{17}{30}\)
d) \(\frac{3}{8}\)\(+\)\(\frac{1}{12}\)
\(=\)\(\frac{9}{24}\)\(+\)\(\frac{2}{24}\)
\(=\)\(\frac{11}{24}\)
2 Tính
1) \(\frac{2}{5}\)\(-\)\(\frac{1}{10}\)\(+\)\(\frac{1}{2}\)
\(=\)\(\frac{4}{10}\)\(-\)\(\frac{1}{10}\)\(+\)\(\frac{5}{10}\)
\(=\)\(\frac{3}{10}\)\(+\)\(\frac{5}{10}\)
\(=\)\(\frac{8}{10}\)
2) \(3-\frac{1}{4}\)\(+\frac{1}{6}\)
\(=\)\(\frac{36}{12}\)\(-\frac{3}{12}\)\(+\frac{2}{12}\)
\(=\)\(\frac{33}{12}\)\(+\frac{2}{12}\)
\(=\)\(\frac{35}{12}\)
3) \(4\)\(-\)\(\frac{2}{5}\)\(+\)\(\frac{3}{2}\)
\(=\)\(\frac{40}{10}\)\(-\)\(\frac{4}{10}\)\(+\)\(\frac{15}{10}\)
\(=\)\(\frac{36}{10}\)\(+\)\(\frac{15}{10}\)
\(=\)\(\frac{51}{10}\)
4) \(\frac{30}{45}\)\(+\)\(\frac{10}{70}\)\(-\)\(\frac{15}{30}\)
\(=\)\(\frac{2}{3}\)\(+\)\(\frac{1}{7}\)\(-\)\(\frac{1}{2}\)
\(=\)\(\frac{28}{42}\)\(+\)\(\frac{6}{42}\)\(-\)\(\frac{21}{42}\)
\(=\)\(\frac{34}{42}\)\(-\)\(\frac{21}{42}\)
\(=\)\(\frac{13}{42}\)