• Sections : Algebra • The theme of the lesson : " Decimals " • Type of lesson : learning new material.
• Lesson Objectives : Educational : • learn to write and read decimals; • Improve computer skills. developing: • to develop interest in the subject, cognitive and creative activity of students mathematical language, memory, attention; • develop independence in the development of new knowledge.
educational: • educate pupils responsible attitude to school work, endurance and stamina; • develop a sense of friendly atmosphere in the classroom and the ability to work in pairs.
• Lesson Plan : • • • Organizing time. Teach the basic properties of decimals. Show examples of the solutions. Work in group Reflection ( " What do I know ? " " Know what ? ", "What happened ? " , " What is not? ) • Give homework • Summing up the results of the lesson.
• Decimal fractions - a fractional number represented in decimal notation. Voiced by definition allows examples of decimals: 152. 21, 3. 00762, 0. 15, 0. 00000003, 598, 567 321. 3500. Decimal fractions, which correspond to the right of fractions, also read like the ordinary fractions, only more pre-added "zero point". For example, the decimal fraction 0. 12 corresponds to common 12/100 (read "twelve hundredths"), so 0. 12 is read as a "zero twelve cents. "
• Recorded decimal fractions, as well as natural numbers in the record, the value of each digit depends on its position. Indeed, the number 3 in decimal 0. 3 is three tenths decimal 0. 0003 - three ten thousandths and in decimal 30 000. 152 - thirty thousand. Thus, we can talk about discharges in decimals, as well as of the discharges in natural numbers.
• Finite decimals - this decimals, in the records that contain a finite number of characters (digits). Here are some examples of finite decimals: 0. 317, 3. 5, 51. 1020304958, 230 032. 45. • Infinite decimals - this decimals, in the recording which is an infinite number of digits. Here are some examples of infinite decimals: 0, 143940932…, 3, 1415935432…, 153, 02003004005…, 2, 11111…, 69, 74152152152….
• Tasks • Use models on a 10 x 10 grid as necessary to guide the class in comparing decimals numbers using > and <. • 1. 0. 2 (? ) 0. 02 • 2. 0. 3 (? ) 0. 33 • 3. 1. 999 (? ) 2. 000 • 4. 0. 15 (? ) 0. 51 • 5. 0. 51 (? ) 0. 509 • 6. 0. 183 (? ) 0. 083 • 7. 1. 460 (? ) 1. 604 • 8. 0. 005 (? ) 0. 011 • 9. 1. 003 (? ) 0. 339 • 10. 1. 06 (? ) 1. 007
• • • 1. 0. 2 (>) 0. 02 2. 0. 3 (<) 0. 33 3. 1. 999 (<) 2. 000 4. 0. 15 (<) 0. 51 5. 0. 51 (>) 0. 509 6. 0. 183 (>) 0. 083 7. 1. 460 (<) 1. 604 8. 0. 005 (<) 0. 011 9. 1. 003 (>) 0. 339 10. 1. 06 (>) 1. 007
• • • Home work: 0. 02 0. 33 2. 5 0. 51 0. 509 0. 083 1. 4 0. 99 1. 03 1. 5
Thank you for attention!!!
