How to build a number in a standard appearance. Standard view of a positive number

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Type of lesson: Lesson explanation and primary consolidation of new knowledge.

Equipment: Route leaf (MR) ( Attachment 1 ); Technical equipment lesson - computer, projector for demonstration presentation, screen. Computer presentation in Microsoft PowerPoint.

DURING THE CLASSES

I. Organization of the beginning of the lesson

Hello! Please check the availability of dispensing material on your desk and your readiness for the lesson.

II. Message Topics, Goals and Tasks

- Before learning a new topic, perform tasks on the first page of the route sheet (check on the screen). If you correctly completed tasks, then you should get a word - standard.
What is the standard? Where did you meet with this word? What does it mean? (SCREEN)
Standard (from English - standard.) Sample, standard, model with which are compared, such objects, processes compare. (Universal Encyclopedic Dictionary). Those., When they talk about the standard, people are easier to imagine what it is about. And today we will talk about the standard form of the number. So, this is the topic of today's lesson.

III. Totalization of students' knowledge. Preparation for active educational and cognitive activity at the main stage of the lesson

- Let's make a lesson plan:

1. Reiteration
2. Determining the degree of number;
3. Determining the degree of a number with a negative indicator;
4. Degree properties;
5. Definition of a standard type of number;
6. Actions with numbers recorded in standard form;
7. Application.

In the world around us, we are faced with very large and very small numbers. We already know with you how to record large and small numbers with the help of the degree of number.

- Is it convenient to record numbers in this form? Why? (Occupy a lot of space, spends a lot of time, it's hard to memorize.)
- What do you think, what is the yield found from this situation? (Record numbers with degrees.)

Write down the mass of the earth using the degree of the number. 598 10 25. Now write down the mass of the hydrogen atom. 17 10 -20. Is it possible to write these numbers otherwise using degrees? Try! 59.8 10 26, 5.98 10 27; 0, 598 10 28; 5980 10 24.
17 10 –20 ; 1,7 10 –19 ; 0,17 10 –18 ; 170 10 –21 ;

- All results are correct. But can we talk about the standard record? How to be? (Agree on a single recording of numbers.)
- Try to discuss with a neighbor, what record should be united, standard?
- What should there be a multiplier before the degree of 10 to be convenient and remember the number and present it?

IV. Mastering new knowledge

- Please open textbooks p.35 and find the definition of a standard type of number and write it to the route sheets.
- the standard view of the number is called a view but 10 n, where 1 < but < 10, n – целое. n – называют порядком числа.

- In the standard form you can write down any positive number !!!
Why? (By definition. Because the first multiplier number belonging to the interval from)