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câu 1: có "yesterday'' nên sẽ ở QKĐ, dùng ở phủ định là S+didn't V nên sẽ là
1. Lisa didn't go to work yesterday. She wasn't feeling well
1. didn't go
2. doesn't rain
3. learnt
4. are they talking
5. goes
6. am helping
7. has
8. came
- Cities is big. The life is exciting. Public transport is good. But life is stressful. People are busy running one place to other.
- Life in the contry may be boring but peolpe are close nature and the air is clean. People have a relaxed lifestyle. But there is nothing bad, they have nothing to do all day.
Chúc e học tốt!
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) \(\frac{30}{45}\)\(+\)\(\frac{10}{70}\)\(-\)\(\frac{15}{30}\)
\(=\)\(\frac{2}{3}\)\(+\)\(\frac{1}{7}\)\(-\)\(\frac{1}{2}\)
\(=\)\(\frac{28}{42}\)\(+\)\(\frac{6}{42}\)\(-\)\(\frac{21}{42}\)
\(=\)\(\frac{34}{42}\)\(-\)\(\frac{21}{42}\)
\(=\)\(\frac{13}{42}\)
1 . weak to run fast .
2 . tall enough to reach the ceiling / short that he/she can't reach the ceiling / such a short child that he/she can't reach the ceiling .
3 . expensive that I can't buy it / such an expensive house that I can't buy it / cheap enough for me to buy .
4 . simple enough for him to do / difficult for him to do .