Calculation method
When calculating decimal multiplication with decimals, it is still calculated according to the calculation method of integer multiplication, and then look at how many decimals there are in the two factors of multiplication, and then count a few numbers forward from the right side of the product, and just point the decimal point.
For example, when calculating 3.4×0.3, we should first calculate 34× 3 = 102, because each factor has a decimal place, so we can calculate two places forward from the right side of the product, just counting the decimal point, so 3.4×0.3= 1.02.
For another example, when calculating 7.03×0.4, you can first calculate 703×4=28 12, because the two factors * * * have three decimal places, so count three places forward from the right side of 28 12 and point the decimal point. Therefore, 7.03×0.4=2.8 12.
Matters needing attention
1, there are several decimal places in the factor and several decimal places after the product decimal point.
2. If the decimal places of the product are not enough, the digits should be preceded by 0.
3. In the calculation result, the 0 at the end of the decimal part should be removed.
Learning skills of mathematics in primary schools
Cultivate interest
Interest is the best teacher. Only when children have a strong interest in mathematics will they take the initiative to learn and maintain a lasting enthusiasm in the learning process. Parents and teachers can stimulate children's interest in mathematics in various ways.
Understand this concept
Mathematics is not only about memorizing formulas and calculations, but also about understanding mathematical concepts. Children need to understand the meaning of mathematical concepts and why it is right, so that they can use what they have learned flexibly when they encounter different problems. Therefore, parents and teachers should encourage children to think more and ask more questions to help them understand and master mathematical concepts.
Do more exercise.
Mathematics is a subject that needs a lot of practice. Only through a lot of practice can children master all kinds of skills and get good grades in exams. Parents and teachers can provide children with all kinds of practice materials, so that students have time to practice by themselves after class.
Cultivate the ability to solve problems
Mathematics is a problem-solving science. In the process of learning mathematics, children should not only learn to use existing knowledge and methods, but also learn to find and solve problems by themselves. Parents and teachers can encourage children to find the application of mathematics in life.