THEM OF THE LESSONS Decimal fractions Lesson

THEM OF THE LESSONS Decimal fractions

Lesson purpose Educational: to organize work of pupils on studying and primary fixing of the concept "decimal fraction", algorithm of record of decimal fractions. Developing: to develop the mathematical speech at pupils, to promote independence development, ability to estimate the work. Cultivate: to cultivate interest in mathematics, discipline, a responsible attitude to educational work.

Plan of the lesson: 1. Assimilation of new knowledge 2. Work on an algorithm 3. Individual work. Graphic dictation 4. Home work. (TEST)

1. Mathematical dictation. Write the mixed numbers to notebooks five whole seven tenth(5 7|10) forty two whole fifty two 100 -th (42 52|100) one whole three 100 -th ( 1 3|100)

2. Work on an algorithm 1. we write down the whole part of number and we put a comma

2. after a comma we will put so many end how many zero in a denominator of a fractional part

3. From the last point we write down numerator, since the last sign

4. In blank spaces we write down zero

As these numbers are equal, read decimal fraction similarly seven whole thirty four decimal

Graphic dictation TRUE or FALSE 1. I claim that 0, 24 + 3, 2 = 3, 26. 2. I claim that 1, 5 – 1, 25 = 0, 25. 3. I claim that 3, 27 ∙ 10 = 327. 4. I claim that 564, 5: 100 = 5, 645. 5. I claim that 15, 76315, 8. 6. I claim that 5 = 5, 00000. 7. I claim that 2, 6 ∙ 5 = 13. 8. I claim that 0, 2 ∙ 0, 3 = 0, 6. 9. I claim that 2, 4: 3 = 0, 8.

answers 1. F 2. T 3. F 4. T 5. F 6. T 7. F 8. F 9. T

Home work (TEST) 1. Calculate: 2, 812 + 3, 7 B a) 2, 812; b) 6, 512; c) 5, 512. 2. The difference of numbers 3, 85 and 2, 1 is equal: A a) 1, 75; b) 3, 64; c) 3, 84. 3. 0, 76 * 0, 7598. Between numbers instead of * it is necessary to deliver a sign: a) «>» ; b) «<» ; c) «=» . 4. Round 9, 96 to the tenth, we will receive. C a) 9, 0; b) 9, 9; c) 10, 0. C