Suppose 2007 is the product of five natural numbers, then the combination of these five natural numbers may be
1.2007、 1、 1、 1、 1
2.223、9、 1、 1、 1
3.223、3、3、 1、 1
Similarly, if 2007 is the product of four natural numbers, then the combination of these four natural numbers may be
1.2007、 1、 1、 1
2.223、9、 1、 1
3.223、3、3、 1
The difference between the two numbers in the inscription is the largest, so it can only be subtracted from the largest number and the smallest number.
Therefore, a = 2007+1+1,and B=223+3+3+ 1.
A-B=277 1 is the maximum value.
2. If one number is X and the other number is x+5, there are two cases: 1 and two numbers have a common divisor of 5; 2. Two numbers are coprime; If the common divisor of two numbers is 5, obviously their minimum common multiple is also a multiple of 5, and the difference between the minimum common multiple and the maximum common divisor must be a multiple of 5. Obviously, 203 is not a multiple of 5, so the first case is not satisfied, so the two numbers are coprime; The greatest common divisor of two prime numbers is 1, so the least common multiple of these two numbers is 203+ 1=204. Because these two numbers are coprime, the least common multiple of these two numbers is their product, so the prime factor of multiplying these two numbers by 202,202 is 204 = 2 * 2 * 3 * 65438+.
3. 1 1 to 20, there are121618 65438 65438 65438/kloc.
4. Subtract the original four digits to get 2007.72, which means that he clicked the decimal point before the hundredth digit, so 2007.72/99=20. 28
So this number is 20. 28* 100=2028
5. Cyclic decimals are written as abc/999 and 58, so decimals can be divided into 999 factors of 3, 3, 3 and 37. Because the sum is 58, the denominator can only be 37 and 27. Because it is a true fraction, the numerator is smaller than the denominator, so the numerator is 58-37=2 1 and the denominator is 37, so it can be divided by 567/97.
6. The fractional part is (17.88-15.64)/(8-1) = 0.32.
The integer part is 15.64-2*0.32= 15.
Yes, so this number is 15+0.32= 15.32.
7. The multiplier is 20.06/(20.066 …-20.06) =1003, so the correct answer is 20.066 … *1003 = 210.130.
8、0.3455……+0.346 1 1……-0.345=0.34666……