Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Decimales

728 views

Published on

  • Be the first to comment

  • Be the first to like this

Decimales

  1. 1. Previous Next
  2. 2. •Savita and Shama were going to market to buy some stationary item Savita have 5 rupees and 75 paise. Shama have 7 rupees and 50 paise. Can we write it in a better way to make it easy to speak and make other understand. Yes, we can do it by writing 5 rupees 75 paise as Rs. 5.75 and 7 rupees 50 paise as Rs. 7.50 Previous Next
  3. 3.  DECIMAL FRACTION- The fraction in which the denominator are 10, 100, 1000, etc…, are decimal fraction.  EXAMPLE- 3 , 5 , 48 , etc…, are decimal fraction 10 100 1000  DECIMALS- The numbers expressed in decimal form are called decimal number or simply decimal.  EXAMPLE- 52.0, 93.5, 3.6, etc…, are decimal. Previous Next
  4. 4. LIKE AND UNLIKE DECIMALS  Like- Decimals having same number of decimal places are called like decimals.  Example- 9.82, 5.70, 4.89 and 7.50 are like decimals  UNLIKE- Decimals having different numbers of decimal places are called unlike decimals.  Example- 98.2, 49.70 and 5.489 are unlike decimals Previous Next
  5. 5. CONVERTING UNLIKE TO LIKE DECIMAL  Example- Convert 5.3, 7.19, 0.376, 84 into like decimal  Solution- In the given number, the maximum number of decimal places is 3. So, we convert each number into 3 decimal places by adding 0 in it.  5.3= 5.300, 7.19= 7.190, 0.376 will remain same and 84= 84.000 Previous Next
  6. 6. Position Of Decimals Hundred Tens s 2 6 Ones 9 Previous Decimal point . Tenths 3 Next Hundred Thousan ths dths 7 4
  7. 7. PLACES If we show units by block then one unit is one block, 2 units are two blocks and so on. One block is divided into 10 equal parts means each part is 1 of unit, 2 parts show 2 tenths, and 5 parts 10 will show 5 tenths and so on. A combination of 2 blocks and 3 parts will be recorded as: 1 block [10 parts] 2.3 1 block [10 parts] 3 parts Previous Next
  8. 8. In tabular form we write the shaded portion as numerator and total boxes as denominator. O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O = shaded 50 100 Previous Next
  9. 9. REPRESENTING DECIMALS ON NUMBER LINE Lets represent 0.6 on number line. We all know that 0.6 is more than 0 but less than 1 and it have 6 tenths so we mark it after leaving 5 places as shown below : 0 0.6 Previous 1 Next 2
  10. 10. COMPARING DECIMALS Compare 63.84 and 57.98  The given decimal are 63.84 and 57.98 Lets us compare their whole number parts 63 > 57 63.84 > 57.98  Compare 98.70 and 98.31  The given number have same whole number so we compare tenths and hundredths. 98.70 > 98.30  Previous Next
  11. 11. MIXED FRACTION AS DECIMALS EXAMPLE: Express the number 2 1 as decimals. 10 SOLUTION : 2 1 = 2+ 1 = 2+0.1 = 2.1 10 10 FRACTION AS DECIMALS Give a point in the given no. as given zero’s in denominator. EXAMPLE: Convert 2103 into decimal. 100 In 2103, 100 have 2 zero so point will be placed after two places in nominator = 21.03. 100 EXAMPLE: Convert 29 into decimal. 7.25 4 4 )29.00( = 7.25 -28 10 -8 20 -20 0 Previous Next
  12. 12. COVERTING A DECIMAL IN A FRACTION •Convert 0.625 in fraction. 5 25 •0.625 = 625 = 5 100040 8 8 •Convert .075 in fraction. 3 •0.625 = 75 = 3 . 1000 40 40 Previous Next
  13. 13. Previous Next
  14. 14. ADDITION OF DECIMALS  Add 27, 39.70, 3.096, 5.75.  Convert the given decimals into like decimals. We get: 27.000, 39.700, 3.096 and 5.750. Now write the addends in a column. 27.000 39.700 3.096 5.750 75.546 Previous Next We get = 75.546.
  15. 15. SUBTRACTION OF DECIMALS  Subtract 27 from 39.70  Convert the given decimals into like decimals. We get: 27.000, 39.700 Now write the in a column. Write smaller no. under large no. 39.700 27.000 12.700 We get =12.700 Previous Next
  16. 16. MULTIPLICATION OF DECIMALS  Multiply 50.05 from 3.5  Write in column. Now do the sum. Now add places in both the number. 50.05 3.5 Previous Next 25.525
  17. 17. DIVISION IN DECIMALS  Divide 7.8 from 2.  Write in dividing form. Now divide it. 3.9 2)7.8( -6 18 -18 0 = 3.9 Press the buttons for Questions Previous
  18. 18. Among 2.6, 2.006, 2.66 and 2.08 the largest number is ?  2.66  2.6  2.006  2.08 Question 2
  19. 19. 1.1 – 0.3 ?  0.08 8  0.8  None of these Question 3
  20. 20. Add : 67.25, 249, 8.785, 9.800 and 0.230 .  353.055  653.035  333.565  335.065 Next Slide
  21. 21. Sargam Tondon Siddeesh Yadav Jessica Arora Rijul Sobti Sherli Guatum
  22. 22. That’s Correct! Question 1 Question 2 Question 3 NEXT SLIDE
  23. 23. Sorry, that’s not correct! Question 1 Question 2 Question 3 NEXT SLIDE

×