Primary Mathematics Thinking Questions Quick Solution .

Question 1: 1-5 7=2 7;5 7 1 14 10 (days); 400*10 2 7=14000 (sets).

Question 2: (86-16) (1-4 9+1) = 45 (yuan) - A; 86-45 = 41 (yuan) - B.

Question 3: (1-3 7) (1-9 13)=13 7;200 (1+13 7)=70 (yuan) - brother;

200-70 = 130 (yuan).

Question 4: 1 (9+1)=1 10;3÷（3+22）=3/25；1 (3 25-1 10) = 50 (person).

1. Solution: There are a total of color TV x sets, and the number of days is Y days.

It takes 14 days for A to assemble alone, so A assembles (x 14) sets of columnable equations (x 14) y = (5 7) x in one day

Solution (xy) 14=(5x) 7

So y 14 = 5 7 y = 10

Because (x 14)y+400y=x and know y=10, x=1400

A: There are 1,400 color TVs in total.

2. Solution: Set a piece with x yuan.

So B's money is (86-x).

x-4/9x=(86-x)-16

x=45, so the armor band is 45 yuan.

1.A loaded a total of 1 14 per day, and the first time he loaded 5 7, so A and B loaded for a total of 10 days.

B 400 units per day, 10 days is 4000 units, 4000 units account for the total (1-5 7) = 2 7

So the total is 14,000 units.

2.A x, B y

x + y = 86

5/9x = y - 16

x = 45 , y=41

First half of the year: 196*3 7=84 (10,000 people).

Third quarter: 84*3 4=63 (10,000 people).

A: In the third quarter, it received 630,000 tourists (630,000).

Tourist arrivals in the first half of the year: 1,960,000 3 7=840,000.

Tourist arrivals in the third quarter: (1,960,000 3 7) 3 4 = 630,000.

Number of people received in the first half of the year: 196 3 7 = 84 (10,000 people).

Number of people received in the third quarter: 84 3 4 = 63 (10,000 people).

A: In the third quarter, it received 630,000 tourists.

First half of the year: 196*3 7=84 (10,000 people).

Third quarter = 84 * 3 4 = 620,000 = 620,000 people.

(Number of tourists in the whole of last year) (Proportion of tourists in the first half of the year) = (Number of tourists in the first half of the year) Three-quarters (Proportion of tourists in the third quarter of the first half of the year) = (Number of tourists in the third quarter).

196 Three-sevenths = 84 Three-quarters = 63 (ten thousand).

The first half of the year received tourists is three-sevenths of the whole year, then the first half of the year received 196 3 7 = 84 (10,000 people).

This problem is actually a question of finding out what fractions of a number are. The number of tourists received in the first half of the year was 3 7 for the whole year, the number of tourists received in the third quarter was 3 4 in the first half of the year, and the number of tourists received in the third quarter was 9 28 for the whole year. It receives about 1.96 million tourists throughout the year, namely:

196 3 7 3 4 = 63 (10,000 people).

630,000 people.

As you can see from the title:

The number of people received in the first half of the year: 196 3 7 = 84 (10,000 people) The number of people received in the third quarter: 84 3 4 = 63 (10,000 people) Answer: 630,000 tourists received in the third quarter.

People who love math will give you honest answers.

The number of people received in the first half of the year: 196 3 7 = 84 (10,000 people) from above.

Number of visitors received in the third quarter: 84 3 4 = 63 (10,000 people) Answer: 630,000 tourists received in the third quarter.

196 times three-sevenths multiplied by three-quarters = 630,000 people.

A: In the third quarter, it received 630,000 tourists.

Solution: Pick-up in the first half of the year: 1760000 3 7 = 840000 (people).

Pick-up in the third quarter: 840,000 3 4=630,000 (people).

A: In the third quarter, it received 630,000 tourists.

If x number of tourists is received in the third quarter, then 4 3x = 196 * 3 7, so x = 630,000 people.

The number of tourists received in the first half of the year: 196*3 7=840,000.

Tourists received in the third quarter: 84 * 3 4 = 630,000.

The number of tourists received in the first half of the year was: 96 3 7 840 million

The number of tourists received in the third quarter was: 84 3 4 = 630,000

A: In the third quarter, it received 630,000 tourists.

Tourists received in the first half of the year: 196*3 7=840,000.

Tourists received in the third quarter: 84*3 4=630,000.

The number of receptions in the first half of the year was 196 * (3 7) = 840,000.

The reception in the third quarter was not 84 * (3 4) = 630,000.

So the fourth quarter is 196-84-63 = 10,000.

The reception volume in the first half of the year is 3 7 * 196 = 84 (10,000 people).

The reception volume in the third quarter is 3 4*84=63 (10,000 people).

A: The number of visitors in the third quarter was 630,000.

Number of people received in the first half of the year: 196 3 7 = 84 (10,000 people).

Number of people received in the third quarter: 84 3 4 = 63 (10,000 people).

First half of the year: 196 3 7 = 84 (10,000).

Third quarter: 84 3 4 = 62 (ten thousand).

Because a tourist scenic spot received about 1.96 million tourists last year, the number of tourists received in the first half of the year was three-sevenths of the whole year, so the number of tourists received in the first half of the year was 1,960,000 7 3 840,000, because the third quarter received three-quarters of the first half of the year, so the third quarter received tourists was 840,000 4 3 630,000

This kind of problem should be drawn while doing the question, the length is increased by centimeters, the area is increased by 10 square centimeters, and a small rectangle can be reflected on the diagram, knowing that one side of this small rectangle is centimeters, and the area is 10 square centimeters, you can find out that the other side is 10 centimeters), the length of this side is the width of the original rectangle; In the same way, the length of the original rectangle can be found to be centimeters), so the area of the rectangle is square centimeters).

Let the original length be x and the width be y (x+ y=10 x * y+3)= Then connect these two equations to find the system of equations, you can calculate the length and width, and then multiply the length by the width to get the original rectangular area Please help me adopt Ha I answered quite well.

s square = length * width so when the area increases by 10 the width is 10 when the area increases the length is so the original area = 4 * square centimeters.

Width 10

Length area 4x72 = 288 square centimeters.

Let the length be x and the width y

x+xy+y=4, that is, the width is 4.

x*(y+3)=xy+

xy+3x=xy+

3x=x=i.e., the area is: 4*

The area of the rectangle = length * width, then width = area of the rectangle length, length = area of the rectangle width 10 cm).

length cm) area square centimeters).

Try drawing)

This issue is a small case

cm) 10 cm).

4x72=288（cm²）

There are two algorithms, one is that four bottles are side by side, and the result is that the length of one loop is 7* four turns.

The second is to sit side by side, one loop rope length is 7+7+7+7+7*, four loops are.

So the least is the second type with a rope length.

There are two types of tying, but the rope used to put them together is the least. The length of a loop of rope is 7+7+7+7+7* and four loops are .

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You can go. Coke Take a look at the detailed picture below!

I hope it will help you, if you don't understand, you can ask me, I wish you a higher level in your future studies! o(∩_o~

Answer. The diameter is 7. There are four sevens in one circle plus the circumference of a circle. Four of them are 200 cm long. It's easy to draw a picture.