One + Two + Three + Four + Five + ... + Ninety-nine + One Hundred = ? (Answer By English)
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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
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
(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?
1.Forty plus thirty equals
A.seventy
B.sixty
C.fifty
2.sixty-five plus forty-one equals
A.one hundred and four
B.one hundred and five
C.one hundred and six
3.one day is twenty-four hours,two day is.....-.......hours
A.fourty-six
B.fourty-seven
C.fourty-eight
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
One + Two + Three + Four + Five + ... + Ninety-nine + One Hundred
= ( One + One Hundred ) x ( One Hundred :Two )
= One hundred and one x fifty
= Five thousand and fifty( 5050 )