Make sentences with "sending charcoal in the snow"

Today, the temperature dropped suddenly. My mother brought me clothes. It's a timely help!
During the earthquake, thanks to the donations from people from all over the world, it was a timely help!

Sentence making in the snow
Beautiful

Send charcoal in the snow - it's very cold in the snow. Send charcoal to warm others. It means to give support or help when others are in urgent need
His action is like sending charcoal in the snow, which has given us great help
2. During the summer vacation, our family went out to travel, but we forgot the flowers on the balcony. Fortunately, the thunderstorm in summer sent charcoal in the snow, otherwise, the flowers would have withered
In the most difficult period of the Anti Japanese War, the arrival of Bethune was undoubtedly a timely help!

Sentence making of "sending charcoal in the snow"

Zhouqu had a major natural disaster, people are in danger, compatriots from all over the country sent a lot of relief materials, this is really timely, this also reflects the national unity is a family

Simple calculation (17.6 + 17.6 + 17.6 + 17.6) × 2.5

(17.6+17.6+17.6+17.6)×2.5
＝17.6×4×2.5
＝17.6×（4×2.5）
＝17.6×10
＝176

For two numbers x and y, y △ x denotes y * A-X * 2, and 8.2 △ 6.5 = 3.1 is known, 2.9 △ 5.7 is calculated
Not only the answer, but also the calculation process

After substituting, it becomes a linear equation of one variable
6.5a-16.4=3.1
a=3
Then we substitute x = 2.9, y = 5.7 into 3y-2x
The answer is 11.3

The area of a polygon
4. The area of a parallelogram is 90 square decimeters, the bottom is 0.5 meters, its height is () decimeters, and the area of a triangle with the same height as its bottom is ()
5. The area of a parallelogram is 30d m2, and the area of a triangle with the same base and height is ()
6. The area of a trapezoid is 20 square decimeters, the sum of the top and bottom is 8 decimeters, and its height is ()
7. Two triangles of () can be combined into a () shape. If the area of the triangle is 15 square decimeters, then the area of the combined figure is ()
8. The base of a triangle is 6cm, the height is 2DM, and the area of a parallelogram with the same base and height is ()
9. If the height of a parallelogram is 4 cm, then the height of a triangle is () cm
10. The three sides of a right triangle are 6cm, 8cm and 10cm respectively. Then the area of the triangle is (), and the height of the hypotenuse is ()
11. There are several layers of steel pipes in a trapezoid. There is one difference between each two adjacent layers. There are eight at the top layer and 17 at the bottom layer. There are () steel pipes in this pile
12. The base of a triangle is doubled and the height is doubled. Its area is ()

4. The area of a parallelogram is 90 square decimeters, the bottom is 0.5 meters, its height is (18) decimeters, and the area of a triangle with the same height as its bottom is (45 square decimeters)

Area of polygon exercise 17 (3)

The first one: 18-12 = 6, 18 × 9 = 162, 9 × 6 △ 2 = 27

60% of a number is more than 40%. 22. What's the number?
The sum of 36% and 9% of a number is 315

1、
This number
=22÷（60%-40%）
=22÷20%
=110
2、
This number
=315÷（36%+9%）
=315÷45%
=700

Fifth grade determinant problems
The quotient of a certain number divided by 0.01 plus this number, the sum is 3.03, find this number, thank you!
I hope you can give me a formula

Let the unknown be a
01 + a = 3. 03
A+0.01A=0.0303
1.01A=0.0303
A=0.03

(1) 2.5 times of a number is more than 6 / 10 of it, 38. Find the number. (2) a two place decimal, after removing the decimal point, becomes an integer, 13.86 more than the original number, find the two place decimal

(1) Let this number be x.2.5x-610x = 38, & nbsp; & nbsp; & nbsp; & nbsp; 1.9x = 38, 1.9x ／ 1.9 = 38 ／ 1.9, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 20. A: this number is 20. (2) let this two decimal places be x, then the decimal point is 100x

Make sentences with "sending charcoal in the snow"