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NN
13 tháng 3 2022
a) 4+2/5=22/5
b) 5/4+2=13/4
c) 3+3/2=9/2
d) 3/4-1/8=5/8
e) 17/15-7/10=13/30
g) 25/12-15/8=5/24
h) 5-4/3=11/3
i)15/4-3=3/4
13 tháng 3 2022
a)\(\dfrac{4}{1}+\dfrac{2}{5}=\dfrac{20}{5}+\dfrac{2}{5}=\dfrac{22}{5}\)
b)\(\dfrac{5}{4}+\dfrac{2}{1}=\dfrac{5}{4}+\dfrac{8}{4}=\dfrac{13}{4}\)
c)\(\dfrac{3}{1}+\dfrac{3}{2}=\dfrac{6}{2}+\dfrac{3}{2}=\dfrac{9}{2}\)
d)\(\dfrac{3}{4}-\dfrac{1}{8}=\dfrac{6}{8}-\dfrac{1}{8}=\dfrac{5}{8}\)
e)\(\dfrac{17}{15}-\dfrac{7}{10}=\dfrac{34}{30}-\dfrac{21}{30}=\dfrac{13}{30}\)
g)\(\dfrac{25}{12}-\dfrac{15}{8}=\dfrac{50}{24}-\dfrac{45}{24}=\dfrac{5}{24}\)
h)\(\dfrac{5}{1}-\dfrac{4}{3}=\dfrac{15}{3}-\dfrac{4}{3}=\dfrac{11}{3}\)
i)\(\dfrac{15}{4}-\dfrac{3}{1}=\dfrac{15}{4}-\dfrac{12}{4}=\dfrac{3}{4}\)
DT
Đỗ Thanh Hải
CTVVIP
7 tháng 8 2021
|
12 tháng 9 2020
có thể xem bản in ở đây f.vietnamdoc.net/pdf/viewer.html?file=%2fdata%2ffile%2f2017%2f06%2f08%2fbai-tap-luyen-thi-ioe-lop-4.pdf
1 tháng 8 2021
1. I like / football / the rain. / playing / in
i like playing football in the rain
2. the / are / in / My toy / brown box.
my toy are in the brown box
3. My uncle has to work hard from 5 in the morning to 7 in the evening.
4. Odd one out:
A. uncle B. aunt
C. father D. friend
5. is / When / your / birthday?
when is your birthdday ?
6. me? / you / write / to / Can
can you write to me
7. Is it a round box? – No, it is a square box.
8. Ha can dance but cannot play football.
9. What time is it? – It ... four fifteen.
A. is B. has C. at D. in
10. Mr Smith / a lot of / grows /vegetable /grows/
mr smith a lot of vegetable grows in his garden.
11. four seasons / our country. / in / are / There
there are four seasons in our country.
12. How old is he? – He is 10 years old.
13. What a ... doll! My children like it very much.
A. better B. lovely
C. awful D. expensive
14. Don't write ... the walls.
A. on B. at
C. in D. to
15. and / dance. / swim / My brother / can
my brother can swim and dance
16. Where / are / from? / you
where are you from ?
17. There are five fingers is one hand.
18. My brother is seven years old.
20. your / please. / me / pen, / Show
show your me pen , please .
19. go to / don't / school / on Sunday. / I
i don't go to school on Sunday.
20. Go to the door, please.
21. Thank you very ... .
A. much B. so
C. many D. too
22. February is the ... month of the year.
A. first B. second
C. third D. four
23. My mother's / in / birthday / is / February.
My mother's birthday is in February.
24. I often write to Jack and tell him about my school.
25. Listen _ _ the teacher, please. 28. I'm from France. ... you?
A. Too B. This
C. That D. And
26. What would you ... to drink? – Orange juice, please.
A. have B. like
C. do D. take
27. birthday / is / September. / not in / My brother
my mother is birthday not in September.
28. My / not / is / school / big.
my school is not big.
29. Take out your pen, children.
30. My new pencils are on the table.
31. My class is ... 7 a.m ... 11 a.m every day.
A. between / from B. from / in
C. from / to D. at / at
32. Odd one out:
A. Vietnamese B. Japanese
C. America D. English
NH
7
LT
4
Đáp án C
Câu C. 100/20