Primary school math problems, please explain them in detail, and ask for answers to primary school m

1 (2 1/3) (3 1/4) (4 1/5) (5 1/6).

1 2/3 3/4 4/5 5/5 5/5

1 3/2 4/3 5/4 5 6/5

2 2/4 + 4 2/6 + 6 2/8 + 8 2/10 + 27/12

It's too hard to be 0a0

Sorry oh 0a0

I'm glad to be able to help you Hope it helps you, pure hand drip said hope Good luck.

65000 (2 times 10) (125 times 8) = 65

This problem seems to be nothing too special, it is to change the denominator to 60 and calculate it directly.

2 2 4+4 2 6+6 2 8+8 2 10+10 2 12 The last number should be 2 12

36 and 1 6

This depends on how the teacher teaches, whether it is added or subtracted from the dotted box.

There was a student in the first class of Liuqin Meng who transferred out, and now the first line of the silver of the 61 class is 9 10 of the 62nd class.

Class 62: 1 (11 12-9 10) = 60 people.

Now the number of students in class 61: 60*9 10=54 people.

Set up class 61, the existing students of class 62 are 9x people and 10x people respectively, and the problem is obtained by Liang: 9x+1=11 12 10x, and the solution: x=6

9x=54, 10x=60, there are 54 students in class 61, and 60 students in class 62.

1. If two people set off at the same time and in the same place, walking against each other, how many minutes will they meet?

Solution: Let's meet in x minutes.

1/8x+1/10x=1

9/40x=1

x=1÷9/40

x=40/9

2.If the two of them set off at the same time and in the same direction, how many minutes later Xiao Ming surpassed his grandfather by a full circle.

Solution: Set X minutes later, Xiao Ming surpasses his grandfather by a full circle.

1/8x-1/10x=1

1/40x=1

x=1÷1/40

x=40

The place of occurrence at that time took place.

After enlargement, the perimeter of the figure is 30, which is 3 times the perimeter of the original figure and 9 times the area of the original figure.

Hello! Rectangle; x x = square decimeter (side area); Bottom Radius Bottom Area: x x = square decimeter So, x 2 + pie (square decimeter).

Thank you, be sure to choose me.

The side is rectangular, and the side area is multiplied by the circumference of the ground multiplied by the height), and the surface area is the area of the side plus the next two y-circles.

Solution: Let this number be x.

1x of 2 - 1x of 3 = 1/2

3/6x - 2/6x = 3/6 (general score).

x = 3 (50 percent = 1 in 2).

1/2÷（50%-1/3）=3

This number is a 3 or column equation.

x/2-x/3=1/2x=3

Let this number be x, then the equation is 1 2x-1 3x=1 2 Remove the denominator *6 to get 3x-2x=3 So x=3, this number is 3

Let the number be x

x/3---x/2=1/2

Multiplication of 6 x is 3

Let this number be x, 1 2x-1 3x=1 2, and according to this equation, x=3 can be solved

A: This number is 3.