The calculation method is as follows:

1, regardless of decimal point, column vertical calculation:

2. There are several digits after the decimal point of the digital multiplier. In the product of vertical calculation, count several numbers from right to left and point the decimal point.

15.23 is two decimal places and 5.3 is one decimal place, so the product is three decimal places.

Extended data:

This kind of topic is to examine students' fractional multiplication, and the product is a few decimal points.

15.23 is two decimal places, 5.3 is one decimal place, and 2+ 1=3, so the product is three decimal places.

It can be understood as follows:

15.23×5.3= 1523×0.0 1×53×0. 1=( 1523×53)×(0.0 1×0. 1)

=807 19×0.00 1=80.7 19

It is good to be good at calculation, but it is not easy to understand at first. How many decimal places are multiplied by how many decimal places, and how many decimal places is the product?

The decimal places of the actual product are the sum of the decimal places of the two multipliers.

Multiplication is a shortcut to add up the same numbers. The result of its operation is called product, and "X" is the symbol of multiplication. From the philosophical point of view, multiplication is the result of qualitative change caused by additive quantity. The multiplication of integers (including negative numbers), rational numbers (fractions) and real numbers is a systematic summary of this basic definition.

Multiplication is meaning.

3×5 means the addition of five 3s.

5x3 represents the addition of three 5s.

Integer multiplication meets the following requirements: exchange law, association law, distribution law and elimination law.

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