1. Understand the basic concepts and uses of decimal places order table;

2. Master the compiling method and using method of decimal digit sequence table;

3. Be able to apply decimal digit sequence table to solve practical problems.

Second, the teaching content:

The concept and application of 1. decimal sequence table;

2. The compiling method and using method of decimal digit sequence table;

3. The application of decimal digit sequence table.

Third, teaching methods:

1. teaching method: by teaching the concept, writing method and using method of decimal digit sequence table, students can master relevant knowledge;

2. Practice method: Through practical operation, let students master the use and application of decimal digit sequence table.

Fourth, the teaching process:

1. Import new knowledge

(1) Introduce the concept and usage of decimal places order table through examples. For example, decimal places order table is a table arranged according to the number of decimal places, which is used to record and compare the sizes of decimals.

(2) Let students think about the function of decimal digit sequence table, for example, it is convenient to compare the sizes of two decimals, which can help us solve practical problems.

2. Explain how to write and use decimal digit sequence table.

(1) explain the compilation method of decimal number sequence table, that is, arrange the numbers from left to right according to the digits after the decimal point, such as:

Thousands, hundreds, tens, decimal places, one decimal place and two decimal places.

(2) Explain how to use the decimal sequence table, that is, when comparing the sizes of two decimals, compare the corresponding digits from left to right in turn, such as:

0.25 & lt0.3, because 2 < 3.

0. 15 >0. 12, because1>; 0。

3. Apply decimal digit sequence table to solve practical problems.

(1) Let students use decimal digit sequence table to solve practical problems through examples, such as:

Xiao Ming has two coins, 0. 15 yuan and 0.3 yuan. He wants to know which coin has a larger face value. Please compare the sizes of two decimal places with the decimal number sequence table.

(2) Let students write their own decimal places order table, compare the sizes of two decimals, and solve practical problems.

Fourth, the teaching summary:

Through the study of this course, students have mastered the concept, writing method and usage of decimal digit sequence table, and can apply decimal digit sequence table to solve practical problems, thus improving their mathematical application ability.