nine + eight + seven + six + five + four + three + two + one + ten =
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sử dụng phép tính nhanh:
=(one + nine)+(two + eight)+(three + seven)+(four + six)+ten+five
=ten+ten+ten+ten+ten+five
=fifty-five
có số số hạng là:
(10 -1) :1 +1= 10
tổng dãy số là:
(10+1) x 10 :2=45
đáp số :45
dịch
one+two+three+four+five+six+seven+ieght+nine+ten
1+2+3+4+5+6+7+8+9=55
one+two+three+four+five+six+seven+ieght+nine+ten=1+2+3+4+5+6+7+8+9+10=55
1. third
2. ninth
3. twentieth
4. sixth
5. twelfth
6. first
7. thirty-first
8. seventeenth
9. second
10. twenty-third
11. fifteenth
12. eighth
13. fifth
14. eleventh
15. twenty-fourth
16. tenth
17. seventh
18. twenty-eighth
19. fifteenth
20. thirteenth
(a)oh nine eight nine two oh three four six eight
(b), (c),(e), (f),(g) và (h) mik thấy sai sai
(d)oh nine eight seven three four seven five double two
01694051970:oh one six nine four oh five one nine seven oh
Có fải bài này trong vở bt tiếng anh 7 ko?
Write the time
1. A quarter to eight :7h45'
2.From half past six to eight o’clock:from 6h30 to 8h
3.From four o’clock to quarter past five :from 4 to 5h15
4.At twelve o’clock :12h
5.At ten past eight:8h10
6.At ten to eight:7h50
7.From quarter past six to s:even o’clock:from 6h15 to 7
8.At five past two:2h5
9.From seven to nine o’clock:from 7 to 9
10.From ten past four to five o’clock:from 4h10 to 5h
11.At five o’clock:5h
12.At half past seven:7h30
13.From five o’clock to half past six :from 5h to 6h30
one + four + five + ten + nine + six + seven = thirty seven
Meaning:
9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 + 10
= 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
= (1 + 10) x 10 : 2
= 11 x 10 : 2
= 110 : 2
= 55
Answer: 55 ( fifty ).
Tớ nhầm, phải là fifty-five nhé.