1,2,3,5,8,13,（ ）,（ ）.

1,2,3,5,8,13,（ ）,（ ）.

one plus two equals three
Two plus three equals five, and so on. 8 + 13 equals 21, 13 + 21 = 34

Sixth grade mathematics problem 67 * 168 / 169 =?

First use 67 * 168 = 11256, then divide by 169 to equal 11256 / 169
The exact value is 66.60355

168 * 52 * - 67 * 52-52 = (* for ×)

168*52*-67*52-52
=(168-67-1)*52
=100*52
=5200

Observe the following formulas: 1 ^ 2 + (1 * 2) ^ 2 + 2 ^ 2 = 9 = 3 ^ 2, 2 ^ 2 + (2 * 3) ^ 2 + 3 ^ 2 = 49 = 7 ^ 2, 3 ^ 2 + (3 * 4) ^ 2 + 4 ^ 2 = 169 = 13 ^ 2
What rule do you find? Please use the equation containing n (n is a positive integer) and explain the reason
Don't write reason, don't give points!

a^2+(a(a+1))^2+(a+1)^2
=a^2+(a^2+a)^2+a^2+2a+1
=a^4+2a^3+3a^2+2a+1
=(a^2+a+1)^2
That's all right,

1000 most commonly used English words

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Write 30 ordinal words in English

First second third fourth fifth sixth seventh eight nine ten eleven two third fourth fourth fourth sixth sixth sixth sixth seventh seventh twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first twenty first

Fill in the blanks with ordinal numbers
16.When do you get up?I get up at _______ (6:15)
19.You didn't win.You were in _______ (5)place.
23.What's the time?It's _______ （4：36）

16 six fifth or a quarter past six
19 fifth
23 four thirtysix

How to write 1 ~ 100 in English and how to write ordinal numbers

Ordinal number words: the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth, the tenth, the eleventh, the twelfth, the thirteenth, the fourteenth, the fifteenth, the sixteenth

On the writing of ordinal numbers in English
When spelling English words, does the first part of the ordinal number (the ten digit part) remain unchanged and the individual digit part become ordinal?
For example, third first, fortune second, Fifth Third, sixth fourth, seven fifth, eight sixth, nine seventh

Words expressing order are called ordinal numbers, such as one first, two second, three third, five fifth, eight eight, nine nine, and so on
Words expressing numbers are called cardinal words, one, two, etc
The rules of fraction are numerator base word, denominator ordinal word, numerator greater than one, denominator plus "s"
Therefore, the above-mentioned "eight sixths" is wrong and should be "eight sixths"
One third is right

How to write English ordinal numbers

1、 The following are the most basic ordinal words that learners must remember: first, second, second, third, fourth, fifth, sixth, seventh, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth