What is the mantissa of the product of 18 * 28 *. * 98 * 108

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• 3. Write 1,2,3,4,5,6,7,8,9,10,11,12 to the 1999 digit in turn to form the 1999 digit. What is the remainder of this number divided by 9?
• 4. 956 divided by 4 minus 238 times 358 minus 258 equals 100, how to make the formula hold You can only add small outline numbers Is 956% 4-238 * 358-258 = 100
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• 8. Simple calculation 17 * (2 / 19-1 / 17) * 19 Simple calculation 17 * (2 / 19-1 / 17) * 19
• 9. Given a number of 10, if it is multiplied by 25, then divided by 2, then multiplied by 3.14, then multiplied by 2, then divided by 3.14! What is the final number?
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• 12. Simple calculation of 72 * 28 + 72 * 72
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• 16. The known number 40 corresponds to 3.0 The number 42.1 corresponds to X The number 45 corresponds to 1.5 How much is x by interpolation, My friend on the first floor, the formula you gave is wrong, 2.25 - (42.5-42.1) × 5 = 2.05.
• 17. 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?
• 18. 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
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• 20. 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!