Sugar Rush Xmas"，11 choose 5 math questions answer sheet grade

Sub-heading: Answers to 5 out of 11 math questions (Primary Grade) I. Introduction Mathematics is an important subject for exercising logical thinking, and it is very important for primary school students to master basic mathematical concepts and methods. This article will help students better understand mathematics and improve their problem-solving ability by answering 5 out of 11 math problems. Let's take a look at these math problems and their analysis! 2. Topic Here are five representative questions selected from the eleven math questions: 1. Question: Xiao Ming has 12 pencils, how many pencils are left after giving 4 to his classmates? 211. Question: Xiaohong has 8 chickens and 4 ducks in her home, what is the total number of chickens and ducks? 3. Question: When Xiao Hua was calculating a subtraction problem, he regarded subtraction as addition, and got the wrong answer. How does such an error affect the results? 4. Question: What is the sum of the length and width of a rectangle with a circumference of 20 cm? 5. Question: Xiao Gang found that a certain grid can be filled with the number 7 in the Sudoku game, what is the basis for filling in the number 7? 3. Answer analysis Let's break down the answers to each of these questions one by one: 1. Answer: After Xiao Ming gave his classmates pencils, the number of pencils left is 12-4=8. Therefore, Xiao Ming still has 8 pencils left. 2. Answer: The total number of chickens and ducks raised by Xiaohong is 8 + 4 = 12. So, the total number of chickens and ducks is 12.lam the nao de bo choi bai bac 3. Answer: Xiaohua mistakes the subductive number as the addition number when calculating the subtraction, which will lead to a large result. Specifically, assuming that the correct subtraction equation is a-b=c, Xiaohua incorrectly calculates as a+b=wrong result. As a result, the wrong result is greater than the actual result. 4. Answer: The circumference of the rectangle is twice the sum of length and width, i.e. 2 (length + width) = circumference. The circumference is known to be 20 cm, so the sum of length and width is 20/2 = 10 cm. Therefore, the sum of the length and width of the rectangle is 10 centimeters. 5. Answer: Filling in numbers in Sudoku is based on the known information about the rows, columns, or numbers in the palace and the logical reasoning after filling in the numbers. For the grid that can be filled in with the number 7, it is necessary to meet the 7 numbers in the row, column or palace where the box is located, and the numbers in the other boxes after filling in 7 can meet the rules of Sudoku. The specific basis needs to be judged based on the progress of the game and the information that is known. 4. SummaryThrough the analysis of these five math problems, we can see the application of mathematics in daily life and the importance of problem solving. Mastering these basic knowledge not only helps us solve practical problems, but also develops our logical thinking skills. Hopefully, this article will help elementary school students better understand math and improve their problem-solving skills. In the future, let's continue to work hard and explore the mysteries of mathematics! 5. Additional Recommendations There may be difficulties and setbacks in the process of learning mathematics, but as long as we maintain a positive mindset and correct learning methods, we will definitely be able to make progress. It is suggested that students can do more practice questions to accumulate experience in problem solving; You can also try to participate in some math competitions and activities to broaden your horizons; At the same time, it is also necessary to pay attention to the learning and understanding of basic knowledge to lay a solid foundation for future learning. VI. Concluding remarks Mathematics is a fascinating subject that not only trains our logical thinking skills, but also helps us solve practical problems. I hope that students can enjoy mathematics and enjoy the fun brought by mathematics. Let's work together to explore the mysteries of mathematics!