Two elementary school math problems, kneel and beg, everyone help TOT 555

1'Set the original peach x.

Then there is x multiplied by 9 10 multiplied by 8 9 multiplied by 7 8=70 to get x=100

2' Set up x bees in the garden.

Then we have (1 3x-1 5x) multiplied by 3+1+1 3x+1 5x=x to get x=15

And in this case, don't worry about the inexplicable flowers, just remember that all the bees add up to the total number of bees in this swarm.

Little pen friend, my sister has worked so hard to answer the question for you, you can add some points.

Also, you have to use your brain to do the questions in the future.

Eat all the remaining 1-1 10 = 9 10 after eating on the first day, eat all the remaining 9 10 (1-1 9) = 8 10 on the third day, eat all the remaining 8 10 (1-1 8) = 7 10 10 The original peaches on the tree: 70 (7 10) = 100.

The bees that fly to the moon flower are (1 3-1 5)*3=2 5, and the remaining 1 accounts for 1-1 5-1 3-2 5=1 15 of the total, so there are 1 (1 15) = 15 bees in total.

If you eat x peaches on the tree, you eat x 10 on the first day, and 9x 10 remains, and on the second day, you eat 9x 10 1 9=x 10, and you have 8x 10 left, and on the third day, you eat 8x 10 1 8=x 10, and there are 7x 10 left, then 7x 10=70, x=100

2. There are 15 in total.

Because the number of bees is definitely an integer, consider common multiples of 3 and 5.

1.There are 100 peaches, 70 (10 9*9 8*8 7).

2.If there are 15 bees and there are x, then 1 5x+1 3x+(1 3x-1 5x)*3+1=x;

1. Use arithmetic methods to solve:

Bicycles: (3 16-38) (3-2) = 10 (units) Tricycles: 16-10 = 6 (units).

Solve with the equation: Solution: Let there be x bicycles:

2x+3×（16-x）=38

Get x = 10 tricycle: 16-10 = 6 (units).

2. Solve by arithmetic methods

6 yuan = 60 jiao.

2 angles: (5 18-60) (5-2) = 10 (sheets) 5 angles: 18-10 = 8 (sheets).

Use the equation to solve: Solution: Let 2 angles have x sheets:

2x+5×（18-x）=60

Get x = 105 angles: 18-10 = 8 (cars).

3. 930 35 = 26 and 4 7 (points).

B: (30-26 and 4 7) (1 25-1 35) = 300 (pcs) 300 25 = 12 (points).

A: 30-12 = 18 (points).

1.Tricycle: 38-16*2=6 (units).

Bicycles: 16-6=10 (units).

There are x bicycles, tricycles (16-x).

2x+（16-x）*3=38

2.Pentagon (60-18*2) 3 = 8 (sheets) and two corners 18-8 = 10 (sheets).

Set five corners x sheets, two corners (18-x) sheets.

5x+（18-x）*2=60

3.Set A processing X minutes, B processing (30-X) minutes.

35x+（30-x）*25=930

x=1830-x=12

1.(1) Bicycles: 16x3-38=10 (units) Tricycles: 6 units.

2) Set: tricycle for x vehicles, column equation: 3x+2(16-x)=38x=6 bicycles: 10 vehicles.

2.Insufficient conditions.

3.Set A processing X minutes, B processing (30-X) minutes.

Column equation: 35x+25(30-x)=930

A processing: x=18 (min) B processing 12 minutes.

1.Assuming that all are bicycles, 2*16=32 (only) 38-32=6 (only) tricycles: 6 (3-2)=6 (units) bicycles: 16-6=10 (units) 2Pentagonal (60-18*2) 3=8 (sheets).

18-8 = 10 (sheets) of two corners

Set five corners x sheets, two corners (18-x) sheets.

5x+（18-x）*2=60

3.Set A processing X minutes, B processing (30-X) minutes.

35x+（30-x）*25=930

x=1830-x=12

1。38-16*2=6 tricycles, 16-6=10 bicycles with bicycles x, tricycles y

x+y=16, 2x+3y=38

x=10,y=6

2.6-18 * angle), 18-8 = 10 (2 corners) set 5 angles x sheets, 2 angles y sheets.

5x+.2y=6, x+y=18

x=8, y=18

The armor was dry for x minutes.

35x+(30-x)*25=390

x=18, b=12 minutes.

Solution: x 2-17x+66=0, simplify.

x-11))(x-6)=0

So x=11 or x=6

Since the sum of the other two sides of the triangle is 11, the sum of the two sides is greater than the third side, then the length of the third side is 6

So the triangle has a circumference of 17

1. Use arithmetic methods to solve:

Bicycles: (3 16-38) (3-2) = 10 (units) Tricycles: 16-10 = 6 (units).

Solve with the equation: Solution: Let there be x bicycles:

2x+3×（16-x）=38

Get x = 10 tricycle: 16-10 = 6 (units).

2. Solve by arithmetic methods

6 yuan = 60 jiao.

2 angles: (5 18-60) (5-2) = 10 (sheets) 5 angles: 18-10 = 8 (sheets).

Use the equation to solve: Solution: Let 2 angles have x sheets:

2x+5×（18-x）=60

Get x = 105 angles: 18-10 = 8 (cars).

930 35 = 26 and 4 7 (points).

B: (30-26 and 4 7) (1 25-1 35) = 300 (pcs) 300 25 = 12 (points).

A: 30-12 = 18 (points).

1) Draw the diagram at a glance first, mark -1, 3, column equation: because the distance to a b is equal, roughly judge p between a and b points, that is: x-(-1)=3-x solution: x=1

2) Don't judge whether it exists, but also according to the equation of the problem, x-(-1) +x-3)| 6

Namely: categorical discussions.

When the absolute value of the equation 0 x-(-1) + (x-3) = 6 is solved: x 4

The absolute value of the equation <0 -[x-(-1)]+x-3)=6 yields: x 2

3) The third question depends on the requirements of the question, point A and point B coincide.

Therefore, it takes the same time for a and b to coincide, and set it to t

The distance between point A and point B is 3 (1) 4

So: 2t 4 t

Solution: t 4

So the distance traveled at point P is vt s

6x4＝24

You can ask your classmates about this kind of question, and they will be more detailed than on the Internet.