123456789- 123,456,789

98765432 1-98765432 1

2468 13579-246,8 13,579.

Multi-digit refers to a number consisting of two or more digits. The position of each number represents a different order of magnitude. From left to right, it is thousands, hundreds, tens, digits and so on. Multiple numbers can be used to represent a large numerical range, such as 100, 1000, 10000, etc. When operating on multiple digits, we need to pay attention to the relationship between digits, such as carry and borrow.

When there are multiple numbers, they can be divided into integer and decimal forms.

1, integer: a multi-digit number consisting of the numbers 0-9. The number of digits of an integer is determined by most significant bit, and most significant bit cannot be 0. For example, 1234 and 56789 are integers.

2. Decimal: Multiple digits including decimal point. The number after the decimal point represents the number and size of decimal point. The decimal point can appear anywhere, and the number of digits is not limited. For example, 3. 14, 0.5, 2.7 1828 are all decimals.

Multi-digit has important application and significance in mathematics. We can add, subtract, multiply and divide between multiple numbers and compare the sizes. In real life, many digits are often used to express information such as quantity, amount, time and telephone number.

Multiple digits can also be used for data storage and transmission. Numbers in computers are also stored and processed in the form of multi-digits. Different decimal representations (such as decimal, binary, octal, hexadecimal, etc.). ) You can use different number systems to represent and convert multiple digits.

When dealing with multi-digits, we need to understand the concepts of digits, numerical size, bit weight and so on, so as to correctly operate and explain the meaning of multi-digits.

Matters needing attention when using multiple digits

1. Understand the meaning of numbers: Multi-digits are composed of multiple digits, and each digit represents a certain number or position. Make sure you understand the meaning and function of each number.

2. Correct pronunciation: According to different languages and cultural habits, the pronunciation of multiple digits may be different. Make sure you use the correct pronunciation to avoid misunderstanding.

3. Sequence: Multi-digit sequence is very important. Changing the order of numbers may change their meaning. For example, 123 and 32 1 represent completely different values. When dealing with multiple numbers, make sure that the numbers are in the correct order.