There are five intervals when you knock six times, so the time of each interval is:10 ÷ 5 = 2 (s); When you type 12, there are 1 1 intervals, so the time is: 1 1×2=22(s). Because there is no need to wait for the 1 time of the first six pens, it is impossible to wait for a few seconds at 6 o'clock, so the first time is removed.
Problems such as ringing the bell cultivate primary school students' mathematical thinking. Taking mathematical thinking mode as the main line and primary school mathematics content as the carrier. It aims to cultivate, develop and improve students' thinking level. To solve a problem, some can be solved from different angles with multiple ways of thinking, and some need to be solved with multiple ways of thinking. Let students learn to think in thinking and make them smart.
The book "Mathematical Thinking in Primary Schools" is innovative and ambitious, and its content is from shallow to deep, step by step. According to the grade, each grade is a book, which comprehensively and systematically introduces the common thinking modes in primary school mathematics. Each way of thinking is divided into four parts, namely, focusing on thinking, clicking on methods, learning once, and giving inferences. There are comprehensive exercises, introspection and reference answers at the end of the book, which is an ideal and practical thinking training textbook.
Math:
Mathematics is the study of patterns, or a patterned process (abstraction). Mathematics is to abstract a specific problem into a pure mathematical problem. The solution of this abstract problem has practical significance and is helpful to solve practical problems. Therefore, mathematics has two attributes, namely abstraction and reality (or application). When children learn mathematics, they must start with the concrete things they are familiar with in life and gradually start the abstract process of mathematics.
It can't be called mathematics just to solve specific problems. It is against the essential attribute of mathematics to teach abstract mathematical operations without starting from specific things and divorced from specific practice. Children are in the period of germination and initial development of logical thinking, and it is also the period of initial formation of mathematical concepts. Mathematics knowledge has a strong logic and abstraction, and learning mathematics can exercise the logic and abstraction of children's thinking.