\(.\)
\(one+four+five+ten+nine+six+seven=\)
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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
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
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
nine + ƒive + seven + seven + ƒour + one + nine + one + one =
= 9 + 5 + 7 + 7 + 4 + 1 + 9 + 1 + 1
= 14 + 7 + 7 + 4 + 1 + 9 + 1 + 1
= 21 + 7 + 4 + 1 + 9 + 1 + 1
= 28 + 4 + 1 + 9 + 1 + 1
= 32 + 1 + 9 + 1 + 1
= 33 + 9 + 1 + 1
= 42 + 1 + 1
= 43 + 1
= 44
\(nine+five+seven+seven+four+one+nine+one+one\)
\(=fourty-four\)
TEN + FIVE = FIFTEEN
FOUR + TWO = SIX
NINE + SIX = FIFTEEN
one + four + five + ten + nine + six + seven = thirty seven
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