Sorting out the knowledge points of scores

1. Divide the whole "1" into several parts averagely, and the number representing such a part or parts is called fraction. Denominator means to divide an object into several parts averagely, and molecule means such a number. Divide 1 into denominator parts averagely, and it means such a molecular part. 2

RELATED INFORMATIONS

1. Similarities between integer and decimal multiplication and division
2. Decimal multiplication and division have the same meaning as integer multiplication and division, right
3. Basic formula of logarithmic function It is known that log10 / 2 = A and log10 / 3 = B. try a and B to denote log12 / 5
4. The proof of the arithmetic of logarithm function in the first grade of senior high school
5. Spreadsheet: the lowest score is the highest, the equal difference score, the formula? For example: the highest score is 50 points, and the equal difference is 0. When the lowest decimal is 3, 50 points will be obtained; when the second decimal is 5, 49 points will be obtained; when the third decimal is 7, 49 points will be obtained, and so on.
6. How to calculate the rapid interpolation method The cost of 1 million is 78 million, and the cost of 30 million is 78 million. How much is the cost of 2006 million?
7. Fineness model 2.8-3.1 sand rate 34-38 that fineness model 2.9 use interpolation method to calculate sand rate? The formula is also written out!
8. In the rent formula r = RV * I (1 + I) ^ n / (1 + I) ^ (n-1), RV (principal) = 10000, n = 12 months, r = 1200
9. How to calculate by interpolation The depth of K0 + 260 is 0.514, the depth of K0 + 280 is 0.472, and the depth of K0 + 262.276 is calculated by interpolation
10. How to use interpolation method to calculate interest rate Given the coefficient of present value (or final value) of annuity and the number of periods n, it is a little unclear when calculating the interest rate according to the interpolation formula Example: a company borrows 20000 yuan at the beginning of the first year, and repays 4000 yuan at the end of each year, which is paid off for nine consecutive years? （P/A,i,9)=P/A=20000/4000=5 When I = 12%, (P / A, 12%, 9) = 5.3282; I = 14%, (P / A, 14%, 9) = 4.9464 So I = 12% + (5.3282-5) / 5.3282-4.9464) * (14% - 12%) = 13.72% The formula I = I1 + (b-b1) / (b2-b1) * (i2-i1), why not I = 12% + (5-5.3282) / 4.9464-5.3282) * (12% - 14%) How to define I1 and I2 in the formula? Which of the 12% and 14% in the above example is I1 and which is I2?
11. What practical problems can be explained by the knowledge and scores
12. Knowledge of primary school marks
13. Is the meaning of fractional multiplication and division the same as that of integer multiplication and division? Are they different?
14. The denominator of A-1 - (a + 1) cm is a + 1? And X / X & # 178; - 25-5 / X & # 178; + 10x + 25, (B / A & # 178; - AB + A / B & # 178; - AB) / A-B / ab
15. 1、[x÷（2－x）]－[（4－x²）÷（x²－4x＋4)] 2、[b÷（a²－ab）＋a÷（b²－ab）]÷[（a－b）÷（ab）]
16. Addition and subtraction of fractions in junior high school 1.1/(m^2-3m)-2/(m^2-9) 2.x^3/(x-1)-x^2-x-1 3.a-2-a^2/(a+2) 4.(x-1-8/(x+1))÷x+3/x+1
17. Fractional addition and subtraction (3x³-12x)/(x²-2x) – (x³-4x)/(x²+2x)
18. Addition and subtraction of fractions What is 5 / 6ab-2 / 3aC + 3 / 4abc
19. The operation of fraction in grade eight It is known that a is not equal to B, B is not equal to C, C is not equal to a, and a / (B-C) + B / (C-A) + C / (a-b) = 0 It is proved that a / (B-C) ^ 2 + B / (C-A) ^ 2 + C / (a-b) ^ 2 = 0
20. Xiaolan's mother bought several bottles of yogurt for 12.5 yuan in the supply and marketing building, but she found in the food optional room of the department store that the same yogurt was 0.2 yuan cheaper than each bottle in the supply and marketing building. Therefore, when she bought yogurt for the second time, she went to the Department store to buy it. As a result, she spent 18.4 yuan and bought 3 / 5 more bottles than the first time. How many bottles of yogurt did she buy in the supply and marketing building for the first time?