Unit 1: Fractional Multiplication

Fractional multiplication (1)

Knowledge point: 1, understand the meaning of fractional multiplication by integer. Fractional multiplication of integers, like integer multiplication, is a simple operation to find the sum of several identical addends.

2. Calculation method of integer and decimal multiplication. The denominator remains the same, and the product of a molecule multiplied by an integer is a molecule. Can be reduced to the simplest part of the quotation.

3. When calculating, you can divide the calculation first.

Fractional multiplication (2)

Knowledge point: 1. Combined with the specific situation, further explore and understand the meaning of multiplying fractions by integers and calculate them correctly.

2. Can find the score of a number.

3. Understand the meaning of discount. For example, a discount of 10% means that the current price is nine tenths of the original price.

Fractional multiplication (3)

Knowledge point: 1, the calculation method of multiplying the score by the score, and it can be calculated correctly.

Molecules are multiplied to be numerator, denominator is multiplied to be denominator, and what can be reduced is reduced first. The calculation result needs the simplest score.

2. Compare the product of fractional multiplication with the size of each multiplier.

The product of true scores is less than any multiplier; The product of true score and false score is greater than true score and less than false score.

Unit 2: Cuboid (1)

Understanding of cuboids

Knowledge point: 1. Know cuboids and cubes, and know the names of each part.