Math problem Xiao Ming buys a book for 18 yuan more, and the difference between two books is 25 yuan

Calculate according to the proposition (18+25) 2+18

Problem solving ideas: The key words in the application problem are average, division is generally used, multiplication is generally used, and addition and subtraction are generally used for who is more or less than whom, and columnar formulas are applied according to the keywords. Problem solving process:

Answer: Xiao Ming has yuan.

Extended Data $ Vertical Calculation - Calculation Process: Dividend.

The divisor is performed from each digit from the high position, and the quotient obtained each time is retained, and the remainder is retained.

Add the next digit to the operation, and the divisor will be divided into digits in this order, and the obtained quotient will be combined in order, and the remainder is the result of the last operation.

Problem solving: Step 1: 4 2=2 The remainder is: 0

Step 2: 3 2=1 The remainder is: 1

Step 3: 10 2=5 The remainder is: 0

According to the above calculation steps, the combined result is:

If you have any doubts, please ask and be satisfied.

Because it is 18 yuan more to buy a book, and 25 yuan is 25 yuan to buy two books, then, 18 + 25 is exactly the money of a book, that is, a book is 43 yuan, then Xiao Ming has 43 + 18 = 61 yuan.

Let Xiao Ming have x yuan.

The ** of a book is (x-18) yuan.

There is still a difference of 25 yuan between the two books.

2 (x-18) = x + 252 x - 36 = x + 25 gives x = 61

Verify that a book is 61-18=43

Two books 43 * 2 = 86 86-25 = 61

The answer is correct Xiao Ming has 61 yuan.

First of all, we must calculate that the ** of a book is 25 + 18, which is equal to 43 yuan.

Then it was calculated that Xiao Ming had a total of 43+18, which is equal to 61 yuan.

Suppose the book is $ x, then.

x+18=2x-25

x=4343+18=61 (yuan).

Answer: Xiao Ming has 61 yuan.

10x2 ten 15 = 35 yuan. A, Xiao Ming has 35 yuan. $25 for a book.

According to the title, you can get Xiao Ming-book=18,2 book-Xiaoming=25. Adding together gives a book = 18 + 25 = 43, so a book is 43 yuan.

Xiao Ming brought X yuan

x-14 is the ** of a book, 2(x-14)-28=x, x=56 yuan

42 yuan for a book, Xiao MingI brought 56 yuan

14 dec. 28 42 (yuan).

42 dec. 14 56 (yuan).

A book costs 42 yuan, and Xiao Ming brings 56 yuan.

Because there is 14 yuan left to buy a book, and now I use this 14 yuan to buy another book, but there is a difference of 28 yuan. So the ** of a book is 14 + 28 = 42 yuan. So Xiao Ming brought 42 + 14 = 56 yuan. So Xiao Ming brought 56 yuan.

Questions. Thank you

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14 + 28 = 42 yuan and the money you need to buy two books, 42 2 = 21 yuan This is the money for one book.

21 + 14 = 35 yuan, Xiao Ming brought 35 yuan.

Suppose Xiao Ming brings x yuan, a book y yuan, and the equation x-y 14 can be listed, and it costs 28 yuan to buy two more books, so y 14, then x 28.

According to the title, it is known that Xiao Ming has ten yuan left to buy a book, and the difference between buying two books is fifteen yuan, and now he needs to ask Xiao Ming how much money he has.

This is a simple logical problem, we can use the method of equations to solve, first let Xiao Ming have x yuan, then the ** of the book is x-10, so you can list equations:

x+15=2 (x-10), solution.

x=35, so Xiao Ming has 35 yuan, and the ** of a book is 25 yuan.

Hope it helps.

From the title, we can find that when Xiao Ming bought the second book, he used up the remaining ten yuan, and there was still a difference of fifteen yuan.

Therefore, the ** of a book is 10 + 15 = 25 yuan.

And Xiao Ming has 25 + 10 = 35 yuan.

10x2 ten 15 = 35 yuan. A, Xiao Ming has 35 yuan. $25 for a book.

Problem Solving Ideas: According to the title, it can be known that Xiao Ming's money, Xiao Hong's money and the money of this book are all unknown, but there is a certain connection between the three, so this problem can be solved by setting a ternary system of equations. The details are as follows:

1. It can be set that Xiao Ming has an unknown number of x yuan, and Xiao Hong has a y yuan, and the ** of this book is z yuan, so the ternary system of equations x+15=z, y+26=z, x+y=z.

2. After solving the ternary equation of x+15=z, y+26=z, x+y=z, x=26, y=15, z=26+15=41 yuan, we can get x=26, y=15, z=41 yuan. Therefore, the ** of this book is 41 yuan.

Ternary Linear Equations:

If there are three unknowns in a system of equations, the number of terms in each equation containing unknowns is one time, and there are two or more equations in the system of equations, such a system of equations is called a ternary system of equations. The main solutions of ternary equations include addition, subtraction, and substitution, usually using addition, subtraction, and substitution, and if the equation is difficult to solve, the substitution method is used.

The meaning of the title is: Xiao Ming's money is Xiao Hong's money (26 yuan), and Xiao Hong's money is Xiao Ming's money (15 yuan), so the price of the book is the sum of the money they have in common (pictured).

15+26 41 (yuan).

It should be the sum of the money difference between two people, 41 yuan.

Calculate 28+14+14 according to the column formula

Problem solving ideas: The keywords in the application problem are average, and division is generally used, multiplication, multiplication, who is more or less than whom, addition and subtraction are generally used, and the root paragraph is applied according to the keywords. Problem solving process:

Answer: Xiao Ming brought 56 yuan.

Extended Data $ Vertical Calculation - Calculation Result: The single digit of the two plus numbers is aligned, and then each in the same counting unit.

The number of the upper grasp or is added, and the addition result is 10 to the high position, and the addition of the high level needs to accumulate the result of the low position to 1.

Problem solving: Step 1: 2+4=6

Step 2: 4+1=5

According to the above calculation steps, the combined calculation result is 56

If you have any doubts, please ask and be satisfied.

3 (this).4 (yuan).

7-4=3 (yuan).

Answer: Seven yuan per book banquet is high disadvantages, you can buy 3 copies, there is still 4 yuan left under the ruler, if you need to buy another book, you need 3 yuan.

Summary. 350÷45=7……357 2+1=15 copies.

It costs 24 yuan to buy a book, 45 yuan can buy two copies, and Xiao Ming has 350 yuan, and you can buy a few copies at most.

350÷45=7……357 2+1=15 copies.

This question is because it is cheaper to buy two copies, so we have to take a look at how many 45 are in 350 and how many two copies there are, and use 350 45 to find that there are seven 45 in it, and finally there is 35 yuan left, so this 35 yuan can also buy another one, so a total of 7 2 + 1 = 15 copies.