I don't understand other functions.
There is no fixed answer to the three-digit estimation in the second grade of primary school. It all depends on the specific situation, some are estimated by the whole hundred, and some are estimated by the whole ten. In Dongdong, in fact, it is difficult for second-grade teachers to teach. As long as the child's estimate is reasonable, it is correct.
Math problem 6( )6( )6( )6( )6=24 5 6, 5 4, not 4!
6*(6-(6/6))-6=24
4*(4+(4/4))+4=24
I want to find some math problems for the second semester of grade two in primary school. 1. Can you fill in the following blanks? Use your head and give it a try (20 points)
1, four digits, the highest digit is 8, the tenth digit is 2, and the rest digits are 0. This number is written as () and pronounced as ().
2. When calculating division, every time you find the quotient, the remainder must be greater than the divisor ().
3. The number that ① 76 is less than 687 is () ② 588 is greater than 1 15 ().
4. Xiaolan arrives at school at 7: 40 and goes home for lunch at 1 1: 30. Her study time at school in the morning is () hours.
58750kg = () kg () g
6, 1 kg of eggs is about ().
7, your own weight is about ()
8,2 minutes 12 seconds = () seconds.
97000 g = () kg
10，86kg = () g
1 1, 6 kg, 60 g, 5,000 g, 5,200 g, in descending order.
()& lt()& lt()& lt( )
12, in ○, "< or" = ".
① 438 + 164○2 10 1 – 90 ② 297○573 – 286 ③ 967 - 158○809
Second, to judge the following questions, mark "√" for the right and "×" for the wrong (10).
1, read and write, all starting from the highest bit. ( )
2. In subtraction, the minuend must be greater than the subtraction. ( )
Subtract a three-digit from a four-digit and you may get a three-digit or four-digit number. ( )
4. Compared with 1 kg cotton and 1000 g iron, iron is heavier than cotton. ( )
5. There are 35 more boys than girls, and 35 fewer girls than boys. ( )
3. Do you know all kinds of calculations? (***35 points)
1, oral calculation (15 points)
76+25= 340+60= 980-70= 500+4000= 86-27=
46÷5= 0÷3= 63-36= 540-80= 60÷9=
700-40= 90-27= 24- 16÷8= 1000+5= 370-200=
2, column vertical calculation (horizontal line inspection) (8 points)
2408+3795= 80 10-4568= 247+968+8293=
3. Calculation of parting (12)
① 4054-507+6 14 ② 25÷5+ 168 ③(4 16-360)÷7 ④ 580-8×9
Four, hands and brains, can be creative (5 points)
Please draw a clock face to let others know that it is 8: 25.
Five, solve practical problems (***30 points)
1. The school bought 48 white balls and 24 flower balls, which were distributed to 9 classes on average. How many people are there in each class? (5 points)
Lingling reads a book, reading 5 pages a day, and there are 56 pages left after 9 days. How many pages are there in this book? (5 points)
3. The school bought chalk. There are 42 boxes of white chalk and 39 boxes of colored chalk. How many boxes of white chalk did you buy? (5 points)
4. Students participating in the training of the team, 22 in grade four, 35 in grade five and 24 in grade six. One line for every nine people, how many lines should I line up? (5 points)
5. On Arbor Day, students in Grade 5 and 6 planted 108 willow trees and 3 rows of poplars, each with 7 trees (choose the appropriate questions below and draw them online, then answer them. ) (10)
(1) How many poplar trees are less than willow trees?
(2) How many trees are there in the fourth grade than in the fifth grade?
(3) How many trees are planted in the fourth and fifth grades?
* Thinking (20 points)
1, use four numbers of 0, 0, 2 and 4 to form four digits as required. (10)
(1) The maximum four digits of these four arrays are ().
(2) The minimum four digits of these four arrays are ().
(3) Don't read any zeros: (), ().
(4) Read only one zero: (), (), (), ().
Cut a rope into two sections, one of which is 24 meters long, which is three times as long as the other. How long is this rope? (5 points)
3. Twenty-five students from Grade One (1) participated in three extracurricular groups, 19 students participated in English group and art group, and 20 students participated in art group and dance group. How many students are there in each of the three groups? (5 points)
4. Mom bought less than 10 apples, two plots were 1 and three plots were 1. How many apples did you say mom bought back? (5 points)
Two friends went fishing, and one caught 2 1. A caught twice as many fish as B. How much did A and B catch? (5 points)
Lifting heavy objects is a phenomenon of (), while lifting heavy objects is a phenomenon of (translation) in math problems in the second grade of primary school.
I hope I can help you, I hope I can adopt it, thank you _
The math problem in the second grade of primary school is whether the arc is a line segment or not. Line segment: two points on a straight line and the part between them are called line segments, and these two points are called the endpoints of line segments.
Of all the straight lines connecting two points, the line segment is the shortest. It is called the shortest line segment between two points.
So: arc is not a line segment!
Give me several math problems in the second grade of primary school last semester. The maximum number of digits is (), the minimum number is (), and they are different ().
On Sunday, my mother and I put a stick together. I know that three identical sticks can form a () shape and four identical sticks can form a () shape.
I want to buy a pen with 7 yuan, and my mother may give me () a pen with 5 yuan and () a pen with/kloc-0 yuan. If my mother gave me 1 RMB 10, I should also get () RMB from 2 yuan and () RMB from 0 yuan.
4. 10 Ten is (), and five ones and three tens together are ().
How to teach the last digit alignment of three-digit subtraction in the second volume of mathematics in the second grade of primary school? Add and subtract single digits, add ten to the previous digit, and subtract the previous digit if it is not enough.
Mathematics in the second grade of primary school: think, ask and fill in. What things (strange, happy, happy, wonderful, funny, yearning, happy, happy, caring,).
Excellent mathematics in the second grade of primary school.
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