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Anonymous users2024-02-13The formula that must be memorized in the third grade of primary school mathematics is as follows:1. Unit price, quantity, total price.
2. Unit output quantity total output.
3. Speed time distance.
4. Ergonomics, time, and total work.
5. Addition + addition and.
6. One plus and another plus.
7. The subtracted number is the difference between the subtracted number and the subtraction.
8. Subtract the subtraction difference.
9. The subtracted number is the difference between the subtracted number and the subtraction.
10. Factor Factor product.
11. One factor product another factor.
12. Dividend.
The divisor quotient. 13. The divisor is the dividend quotient.
14. The dividend quotient divisor.
15. Division with remainder: Dividend quotient divisor + remainder.
16. A number is divided by two numbers in a row, you can first multiply the last two numbers, and then use their product to remove this number, and the result remains the same. Example: 90 5 6 90 (5 6).
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Anonymous users2024-02-121. Conversion of length units. 1 km = 1000 m 1 m = 10 decimetres.
1 decimeter = 10 cm, 1 meter = 100 cm.
1 cm = 10 mm.
2. Area unit conversion.
1 square kilometre = 100 hectares.
1 hectare = 10,000 square meters.
1 square meter = 100 square decimeters.
1 square decimeter = 100 square centimeters.
1 square centimeter = 100 square millimeters.
3. Volume (volume) unit conversion.
1 cubic meter = 1000 cubic decimeters.
1 cubic decimeter = 1000 cubic centimeters.
1 cubic decimeter = 1 liter.
1 cubic centimeter = 1 milliliter.
1 cubic meter = 1000 liters.
Conversion of Area Units:
1）1m²=100dm²。
2）1cm²=。
3）1mm²=。
4）1dm²=100cm²。
5）1dm²=10000mm²。
6) 1 hectare = 10,000 square meters.
7) 1 acre = 100 square meters.
8) 1 mu is approximately equal to square meters.
9) 1 city hectare = 66, square meters.
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Anonymous users2024-02-11The formulas that must be memorized in the third grade of primary school mathematics are:1. Start time + time = end time.
2. End moment - start time = time.
3. End time - time = start time.
4. Work efficiency.
Working hours = total amount of work.
5. Total amount of work working hours = work efficiency.
6. Total work efficiency = working hours.
7. Floor tiles. The number of blocks of the room The area of each floor tile.
8. The area of each floor tile The area of the room The number of floor tiles.
9. The area of the room The area of each floor tile The number of floor tiles.
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Anonymous users2024-02-10The 3rd grade math formula is as follows:1. Measurement: 1) Unit of length:
1 km = 1000 m 1 m = 10 decimetres.
1 dm 10 cm 1 cm 10 mm.
1 m 10 dm 100 cm 1000 mm.
b) Quality Unit:
1 ton 1000 kg 1 kg 1000 grams.
2. Addition and subtraction within 10,000:
1) Subtraction: 1. The subtraction - the difference between the subtraction and the subtraction.
2. Subtraction Subtraction - difference.
3. The difference between the subtracted and the subtracted.
2) Addition: 1. Addition and addition.
2. Addition and —addition.
3) Addition and subtraction checks:
Addition checks:
1. Swap the position of the additive, and unchanged.
2. Use and subtract one addition to equal another addition.
Subtraction checks:
1. The difference between plus and minus is equal to the subtracted number.
2. The difference between the subtraction is equal to the subtraction.
4) Pay attention to the addition and subtraction of pen calculations:
The same digits should be aligned, add and subtract from the single digit, and add up the numbers on the same digit to 1 to the high position if they are full of ten; If the number in any digit is not enough to subtract, it will be detracted by 1 from the previous digit, and ten will be added to the base digit and subtracted.
Three, quadrilateral:
a) The characteristics of the quadrilateral: it has four sides, has four corners, and is a closed figure.
b) Parallelograms.
Features: The opposite sides are equal, the opposite corners are equal, and it is easy to deform.
3) Perimeter: Definition of perimeter: the length of a week around the closed figure.
The circumference of the rectangle (length and width) 2
The circumference of the square is 4
4. Division with remainders:
Division with remainders: The remainder is always smaller than the divisor.
5. Multiply a multi-digit number by a single digit:
a) 0 times any number gives 0, and 1 times any number equals any number.
2) The multiplication rule of multiplying multiple digits by one digit is: multiply from a single digit, multiply each digit of a single digit by each digit of multiple digits in turn, and the product of which digit is multiplied by ten will advance to the previous digit by 1.
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Anonymous users2024-02-09The circumference of the rectangle = (length + width) 2 c = (a+b) 2;The circumference of the square = the side length 4 c=4a; The area of the rectangle = length and width s=ab; The area of the square = the length of the side The length of the side s= a; Area of the triangle = base height 2 s=ah 2;Area of the parallelogram = base height s=ah; The area of the trapezoid=(upper bottom + lower bottom) height 2 s=(a b)h 2;Diameter = radius 2 d=2r radius = diameter 2 r= d 2;Circumference of the circle = pi diameter = pi radius 2 c= d =2 r; Area of the circle = pi radius radius.
The area of the triangle is 2Formula s= a h 2;Area of the square Side length Side length Formula s= a a''Area of the rectangle Length Width Formula s= a b; The area of the parallelogram is the base height of the formula s= a h.
The area of the trapezoid (upper bottom + lower bottom) is high 2 and the formula s=(a+b)h 2;Sum of internal angles: The sum of the internal angles of a triangle is 180 degrees.; The volume of the box Length, Width, Height, Formula:
v=abh；The volume of the box (or cube) Base area High Formula: v=abh; The volume of the cube edge length edge length edge length Formula: v=aaa; The circumference of the circle diameter formula:
l＝πd＝2πr
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Anonymous users2024-02-08The math formula that must be memorized in the third grade is as follows:1) The circumference of the rectangle = (length + width) 2c = (a+b) 22) the perimeter of the square = side length 4c = 4a
3) The area of the rectangle = length and width s = ab
4) The area of the square = the length of the side of the side of the length of the s=
5) Area of the triangle = base height 2s = ah 2
6) The area of the parallelogram = base height s = ah
7) The area of the trapezoid=(upper bottom + lower bottom) height 2s = (a b)h 28) diameter = radius 2d = 2r radius = diameter 2r = d 29) circumference of the circle = pi diameter = pi radius 2c = d = 2 r10) area of the circle = pi radius radius.
11) Unit price, quantity, total price.
12) Unit Yield, Quantity, Total Output.
13) Speed time distance.
14) Ergonomics, time, and total work.
15) Add + Add and.
16) One plus and another plus.
17) Minus minus difference.
18) Minus subtracted difference.
19) Minus minus difference.
20) Factor Factor Product.
21) One factor product of another factor.
22) Dividend Quotient.
23) The divisor is the dividend quotient.
24) The dividend quotient divisor.
25) Division with remainder: Divisor quotient divisor + remainder.
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Anonymous users2024-02-07The math formulas that must be memorized in the second volume of the third grade are as follows:1) The circumference of the rectangle = (length + width) 2c = (a+b) 22) The perimeter of the square = the side length 4c = 4a
3) The area of the rectangle = length and width s = ab
4) The area of the square = the length of the side of the side of the length of the s=
5) Area of the triangle = base height 2s = ah 2
6) The area of the quadrilateral shape of the parallel Youxiang Cave = base height s = ah7) The surface of the trapezoid is good and dry = (upper bottom + lower bottom) height 2s = (a b) h 2 Yanliang 8) diameter = radius 2d = 2r radius = diameter 2r = d 29) circumference of the circle = pi diameter = pi radius 2c = d = 2 r10) area of the circle = pi radius radius.
11) Unit price, quantity, total price.
12) Unit Yield, Quantity, Total Output.
13) Speed time distance.
14) Ergonomics, time, and total work.
15) Add + Add and.
16) One plus and another plus.
17) Minus minus difference.
18) Minus subtracted difference.
19) Minus minus difference.
20) Factor Factor Product.
21) One factor product of another factor.
22) Dividend Quotient.
23) The divisor is the dividend quotient.
24) The dividend quotient divisor.
25) Division with remainder: Dividend quotient divisor + remainder.
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