Unit 1: decimal multiplication.

1, decimal times integer-important: understand the arithmetic of decimal times integer.

2. Decimal Multiply Decimal-Key Points: Decimal Multiply Decimal Calculation Method.

3. The divisor of the product-the key point: the product is the divisor of the decimal. Difficulty: approximate value according to the actual situation.

4. Multiplication, multiplication and addition, multiplication and subtraction-key points: decimal multiplication, multiplication and addition, multiplication and subtraction. Difficulties: guide students to understand the problem-solving ideas that appear in problem solving.

5. The operation law of integer multiplication is extended to decimal-important: understanding the operation law of integer multiplication is also applicable to decimal multiplication.

Unit 2: Fractional division.

1, decimal divided by integer-key point: calculation method of decimal divided by integer. Difficulty: Let students understand how to determine the decimal point of quotient.

2, a number divided by a decimal-the key: master the divisor is the calculation method of decimal division.

3. The divisor of the quotient-Important: When calculating the divisor of the quotient, the decimal place of the quotient should be one more than the required decimal place.

4. Cyclic decimals-Key points: Understand the meaning of cyclic decimals and simply read and write cyclic decimals. Difficulties: How to judge whether the quotient of division is a cyclic decimal?

5. Problem solving-key point: train students to solve problems and let them master the basic steps of analyzing problems.

Unit 4: Simple Equation.

1, using letters to represent numbers-key points: using letters to represent numbers, algorithms and formulas.

2. Use the formula with letters to express quantity and quantity relationship-key point: use the formula with letters to express quantity.

3, the meaning of the equation-the key: a preliminary understanding of the meaning of the equation.

4. Solving equations-key point: understanding the method of understanding simple equations by using balance elements.

5. Slightly complicated equation (1)- Emphasis: Students independently explore ways to solve more complicated application problems through column equations.

6. Slightly complicated equation (2)-Focus: analyze the quantitative relationship. Difficulties: column equation and solution equation.

7. Slightly complicated equation (3)-Key point: set the unknown quantity correctly, find out the equation of equal relationship and solve the problem.