1. How to write the contents of the second-grade mathematics handwritten newspaper?
1. From the right, the first place is the unit, the second place is ten, the third place is one hundred, the fourth place is one thousand, and the fifth place is ten thousand. 2. Pay attention when reading: No matter how many zeros are at the end, there are one or more zeros in the middle, and read only one zero. Note when writing numbers: there is nothing on any number, just fill in a zero placeholder on that number.
3, compare the size of the quantity should be paid attention to:
(1) The number with more digits is greater than the number with fewer digits;
(2) When the number of digits is the same, the number of digits is greater than that of digits; When the number of digits is the same, it will go down in turn. The ratio of one digit to another digit, which digit is larger, indicates that the number is larger.
4. When reading, read from (), in the order of (from high to low).
5. Length units: kilometers, meters, decimeters, centimeters and millimeters.
6. The advance rate between commonly used "adjacent" length units is "10", the advance rate between "separated" 1 00 ",and the advance rate between two" separated "length units is" 1000 ". We also derived seven unit conversion formulas, namely:
1m = 10 decimeter 1m= 10dm
1 decimeter =10cm1DM =10cm.
1cm = 10mm 1cm = 10mm
1m = 100cm 1m = 100cm
1 decimeter = 100 mm 1dm = 100 mm
1m = 1000mm 1m = 1000mm
1 km = 1 000m1km =1000m
7. We also know that there are (10) cells in 1cm, and the length of each cell is1mm.
1 decimeter is about the length of a palm. 1 cent coins are about 1 mm thick.
When long distance is expressed, it is expressed in "kilometers".
8. Written calculation method of three-digit addition (carry addition):
(1) Same-digit alignment;
(2) from the unit;
(3) When the number of digits reaches ten, it will advance to the previous digit 1.
9. Written calculation method of three-digit subtraction (abdication subtraction):
(1) Same-digit alignment;
(2) from the unit;
(3) If the reduction is not enough, borrow a 1, and then add this 10 to reduce it.
10. We can check whether the result is right or wrong.
2. How to write the contents of the second grade mathematics handwritten newspaper?
1, the two meanings of multiplication: (1) means: how many identical numbers add up.
(2) Representation: What is the multiple of a number,
2. Three meanings of division:
(1) means: divide a number into several parts, and each part is a few. (the meaning of sharing equally)
(2) Indicates how many digits a number has. (including the meaning of division)
(3) Representation: One number is several times that of another. (the meaning of multiple division)
Find out how many times one number is another number, and then divide it.
4. Know that one number is several times that of another number, and find a number by multiplication.
5. Know that one number is several times that of another number, and find another number by division.
6. Find the multiple of a number by multiplication.
7. Equitable formula: total number ÷ number of copies = number of copies.
8. Formula including division: total number ÷ each copy = number of copies.
9. Be familiar with the names of all parts of multiplication and division and the reading of formulas.
3×4= 12
Multiplier product
Read: 3 times 4 equals 12.
12÷4=3
Divider quotient
Reading: 12 divided by 4 equals 3.
10, on the map, it is generally up north, down south, left west, right east.
3. How to write the contents of the second grade mathematics handwritten newspaper?
1 has the meaning of remainder division: when some objects are divided equally, sometimes there will be a remainder. 2. Relationship between remainder and divisor: In division with remainder, remainder must be less than divisor. The remainder of is less than the divisor 1, and the smallest remainder is 1.
3. Calculation method of pen division:
(1) Write the division number "Factory" first.
(2) The dividend is written in the divisor, and the divisor is written to the left of the divisor.
(3) Trial quotient, written on the dividend, the dividend-oriented unit.
(4) Write the product of quotient and divisor under the dividend, and the same digits should be aligned.
(5) Divider minus the product of quotient and divisor. If there is no remainder, it means divisibility.
4. The calculation method of remainder division can be divided into four steps: one quotient, two squares, three subtractions and four ratios.
(1) Quotient: Trial Quotient. If you want to multiply the divisor by a few, the nearest dividend is less than the dividend, then the quotient is a few, written on the unit of dividend.
(2) Multiplication: multiply the divisor and quotient, and write the number below the dividend.
(3) Subtraction: Subtract the product of quotient and divisor from the dividend, and write the difference below the horizontal line.
(4) Ratio: Compared with the divisor, the remainder must be small.
4. How to write the contents of the second grade mathematics handwritten newspaper?
Today, my mother gave me a profit and loss problem: the rabbit mother appointed a little white rabbit and a little gray rabbit to pick a certain number of mushrooms in a few days. White rabbits plan to collect 80 rabbits every day for the first five days and 60 rabbits every day for the next few days: Grey rabbits plan to collect 100 rabbits every day for the first three days and 70 rabbits every day for the next few days, so that they can rest for two days. How many days will it take the rabbit to finish the task? How many mushrooms do you want each person to pick? I thought about it and did it: first, I converted the plan of the little white rabbit into 60 yuan a day, and then I chose less: (80-60)×5= 100 yuan. Then, I changed my plan to 70 rabbits a day, and then I picked more: 70×2-( 100-70)×3=50 (one). Then, according to profit and loss problem's calculation formula: number of copies = (profit+loss) ÷ twice distribution difference, the tasks to be completed by the rabbit are calculated (100+50) ÷ (70-60) =15 (days). Finally, using profit and loss problem's formula: total quantity = quantity per time × number of copies+surplus, it is concluded that 80× 5+(15-5 )× 60 =1000 (mushrooms) should be selected respectively.
I told my mother my idea of solving the problem. My mother praised me as a clever child and my heart was full of joy.
5. How to write the content of the second grade mathematics handwritten newspaper?
Today, my mother took my sister and me to Jiaxing to play. When I came back, I saw my mother give the driver 23 yuan.
I thought it was strange later. How did my mother know that she had to pay 23 yuan? I couldn't hold back my curiosity, so I asked my mother, "Mom, how did you know you had to pay 23 yuan?" My mother looked at me and said to me, "Now 5 yuan charges for taxis within 2.5km, and for taxis beyond 2.5km 1.8 yuan ..." My mother looked at me and then said, "Now I want to test you. I just gave the driver 23 yuan money. According to what I said, can you work out how many kilometers we have just driven? I recalled the charging method my mother said in my mind again, and soon I got the result, so I happily said to my mother, "I know!" According to the billing method you just said, you have to subtract 5 yuan from 23 yuan, and then you still have 18 yuan, which is at 1.8 yuan per kilometer, so divide 18 by 1.8, which is equivalent to removing how many kilometers the starting distance is.
Then add the first 2.5 kilometers, then the driver's distance is 12.5 kilometers! "After hearing this, my mother gave me a thumbs-up sign.