Please help me solve the math problem about the multiplication and division of rational numbers in t

Solution: Original = (125 25 5 2 4 8)Solution: Original = (4 2/29) 64 6 2/29 6

24 12/29

23 and 17/29

1. Original = (-1) 125 (-1) 25 (-1) 5 2 (-1) 4 (-1) 8

2. Original formula = 114/29 6

684/29

1 solution: original formula = 125x25x5x8x(-4)x23125x5x8x2x(-4).

15625x8x2x（-4）

125000x2x（-4）

250000x（-4）

2. Solution: original formula = 114x6/29

684/29

The format is 100% correct.

I'll give you these first, there's no multiplier.

Mathematics practice questions for the seventh week of junior high school.

1. Fill in the blanks:1If a 0, then a+ = .If a(b c)=d, then a= .

The number opposite to b and the reciprocal of c and d, and the smallest absolute value of x, then cd (a b) x= .

3.Write the following expressions in the form of omitting the sum of the plus signs, and exchange the positions of the plus numbers reasonably.

4 The warning water level of a certain river section is meters, the highest water level is meters, the average water level is meters, and the lowest water level is meters

5.In rational numbers, the sum of all integers is equal to

6.It is known that the sum of the opposite numbers of these two numbers is , the opposite of the sum of the two numbers is , and the absolute value of the sum of the two numbers is

7..If , then 0, 0.

8.Calculate 1 9 = subtract - from -1 and the sum of , the column is : , and the resulting difference is .

9.The rational number x that holds up can be made . If a + b = 0, then the magnitude relationship between a and b is .

10.The reciprocal of -7 is its inverse is its absolute value is the reciprocal of is the reciprocal of is the reciprocal is equal to the rational number of itself is

a, b, c, d, two. Calculation:

- Calculate in an easy way:

3. Problem solving:

1.The value of Sought is known.

2.If a, b are the opposite of each other, c and d are the reciprocal of each other, and the absolute value of m is 1, find the value of .

3.In order to protect the interests of consumers, business officials recently randomly inspected 20 bags of flour in a flour shop and weighed them as follows (unit: kilograms):

25, 25, 24, 24, 23, 24, 24, 25, 26, 25, 23, 23, 24, 25, 25, 24, 24, 26, 26, 25, please calculate the total weight of these 20 bags of flour and the average weight of each bag, can you find a relatively simple way to calculate it? Please try, based on the results of your calculations, what do you think of this inspection? (Standard weight per bag of flour: 25 kg).

You made a mistake in the question, 5 4 is 5 divided by 4, which means 5 out of 4.

4 5 * (-5 13) - (3 5) * (5 13) - 5 13 * (-1 and 3 5).

5 13) * (4 5-3 5-1 and 3 5) (-5 13) * (1 and 2 5).

It's 7 of the 13-point cover Sakura

2 17)*8-2 and 2 17*8-27*(2 3-4 9+5 27)(2 17-2 and 2 Songhu 17)*8-27*(18 27-12 27+5 27).

There is this **, go find it yourself