In mathematics, what is counting, measuring, marking, sorting

1.Counting is the mathematical act of repeatedly adding (or subtracting) 1, usually used to figure out how many objects there are or how many objects you want to place (counting the first object from one and matching the remaining objects to the natural number starting from two). In addition, counting can also be used (mainly by children) to learn about numeric names and numeric systems.

Included counts are typically used to calculate the number of days in a calendar. Normally, when counting 8 days from Sunday: Monday will be the "first day", Tuesday will be the "second day", and the next Monday will be the "eighth day".

When counted implicitly, Sunday (the day it starts) will be the "first day", and therefore the next Sunday will be the "eighth day".

Early definition: The discipline that studies the shape and size of the earth, determining the coordinates of points on the ground.

2.Current definition: A discipline that studies the shape, size, position, orientation, and distribution of various objects in three-dimensional space.

The content of surveying consists of two parts: measurement and measurement. Measurement refers to the use of measuring instruments and tools to obtain a series of measurement data through measurement and calculation, or to miniatureize the topography of the earth's surface into a topographic map. Surveying and design refers to marking the location of the planned and designed buildings and structures on the drawings on the ground as the basis for construction.

3.Tools for measurement.

Length – scale, vernier caliper.

Quality – Balances.

Time – Timer.

Volume – Measurement of liquids or irregularly shaped solid rungs: graduated cylinders & measuring cups.

Pay attention to 1) correctly read the zero scale, the minimum scale, and the measurement range of the scale;

2) The scale of the scale is as close as possible to the measured object, and cannot be skewed;

3) When reading, the line of sight should be perpendicular to the measured object and the scale;

4) In addition to reading the digits above the minimum scale, the number under the minimum scale should also be estimated;

5) Recorded measurements, including accurate values, estimates, and units (values without units are meaningless).

For precision measurements, pay attention.

1) To consider the influence of measurement temperature and humidity on the measurement results, the measuring tool and the measured workpiece should be placed in the same ambient temperature as far as possible, not less than 1m, 3h for 1 3m, and more than 4h when more than 3m.

2) It is necessary to reduce the error caused by the force measurement.

3) Measurement of surrounding environment requirements: no vibration, no magnetic field, no dust, etc.

3.Some products use numbers to express performance, mostly physical. For example, cement has various grades such as No. 200, No. 300, No. 400, No. 500, and No. 600 due to different compressive strength.

Pan-index symbols and symbols.

Construction: The tension or pressure that the material can withstand per square centimeter.

4.Sorting is a common operation performed in computers to adjust a set of "out-of-order" sequence of records to an "ordered" sequence of records.

1.Counting is the mathematical act of repeatedly adding (or subtracting) 1, usually used to figure out how many objects there are or how many objects you want to place (counting the first object from one and matching the remaining objects to the natural number starting from two).

2.Sorting: The process of arranging disorganized data elements in the order of keywords through a certain method is called sorting.

3.Measurement: It is to use data to describe the observed phenomena according to a certain law of Hechuan, that is, to make a quantitative description of things. Measurement is the process of quantifying non-quantified physical objects.

The difference between counting and measuring: the meaning is different, one is to record a number, and the other is to measure a number.

The difference between marking and sorting: Marking refers to the marking of specific things, which is a process and can generally be in no order. The order is from small to large, from largest to smallest, and there is an order.

Counting: It's just some numbers recorded, 152 undergraduate schools, 100 books

Measurement: The use of an instrument to measure specific data about an object or human body.

Sorting: Arrange numbers or items according to a certain pattern.

Of the natural numbers, which represent counting and measuring, and which represent labeling and sorting.

Hello, the natural number has the number of the table roll pin to measure the number of the table big finger to indicate the sorting: 3, regret 5

The natural numbers are: Hidden Stove Void 2009, Debate Meng 1, Stove Burning

Count measurements

Designator sorting