I came across such a micro-headline from a parent of a third-grade elementary school student.
It is difficult to understand the topic of this parent, let's look at its true face of Lushan
This year, Dad is 40 years old, Xiaoming is 12 years old, when Mingming is old, Dad's age is exactly 3 times that of Mingming?
The comments below are varied, with equations answering the majority, but third-graders have never touched equations at all
In fact, this problem is really not difficult, it is indeed a third-grade primary school problem, as long as you have learned a simple multiplication and division method, you should be able to solve it. But why did it overwhelm so many people?
This is a parent's answer, and it is also the simplest and most understandable in my opinion.
And the problem of differential multiples, the age difference at the primary school level remains constant. When Dad's age is three times that of Bob, the age difference is still 40-12=28, which means that the difference of 28 years is twice the age of Bob. In elementary school, drawing illustrated application questions is the most intuitive.
We often complicate simple things and neglect to look for answers from life, which is why many students can't learn mathematics well.
For example, one of my second-graders in elementary school always has zero points for math applications: ten pieces for a shirt, five pieces for a pair of pants, and ask how much is a set of clothes? So simple, she wouldn't do it. One classmate moves a chair, two classmates move a table, five sets of tables and chairs several classmates move, she will not do. The teacher said that she was too stupid, her mother scolded and yelled to no avail, sent me to study for a month, from failing to the top three of the grade, was she really stupid?
In this child, I found one of the most important points, that is, the lack of common sense in life, the first question, the key point is what is "a set" of clothes, how much is it to replace a set of clothes with a top and a pair of pants? She'll do it. The second question, (the original question is pictured) A set of tables and chairs is a table, two chairs.
The so-called application problem, of course, is closely related to our lives, just like the age difference problem at the beginning of this article, no matter how many years have passed, the age difference is unchanged. All application problems have a key point to solve the problem, and this point is often the common sense of life that we ignore. For example, the key to planting trees is to plant trees at both ends of the road, take a boat, and use a boat to transport less than one boat. In the space model competition, the rules of the competition are whether to win the long flight time in the sky, or the shortest time to complete the trip?
When your child is faced with unsatisfactory grades and no clue to solve the problem, our parents and friends, your child, how much positive and effective guidance have you given him?
Don't let the dead read and destroy our children step by step.