Dividing Numbers (web-based)

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Dividing Numbers by Abdul Hadi Parman (web-based)

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Dividing Numbers (web-based)

  1. 1. Dividing Numbers Prepared by Abdul Hadi
  2. 2. TOPIC: DIVISION <ul><li>Year: 3 </li></ul><ul><li>Learning Objectives: </li></ul><ul><li>- To understand division as sharing equally or grouping. </li></ul><ul><li>- To write number sentences and standard written form for division. </li></ul><ul><li>- To divide numbers within 5, 6 and 9 times- table </li></ul>
  3. 3. Procedures <ul><li>Teacher illustrates pupils the definition of division (recall back their schemata). </li></ul><ul><li>Teacher shows division by sharing equally and grouping. </li></ul><ul><li>Teacher instructs pupils to do the activity and activity 2. </li></ul><ul><li>Teacher facilitates pupils. </li></ul>
  4. 4. What is DIVISION? Mathematics = elementary arithmetic Division is an arithmetic operation which is the inverse of multiplication.
  5. 5. Example: 14 7 a) Sharing equally 14 ice- creams are shared equally between 7 girls.
  6. 6. Therefore, each girl gets…
  7. 7. ………… in Number sentence <ul><li>÷ = </li></ul>
  8. 8. Check answer by MULTIPLICATION <ul><li>X = </li></ul>
  9. 9. Example: <ul><li>12 ÷ 6 = 2 </li></ul>b) Grouping
  10. 10. In standard written form……. <ul><li>2 </li></ul><ul><li>6 12 </li></ul><ul><li>-12 </li></ul><ul><li>0 </li></ul>
  11. 11. Activity 1 : WORD SEARCH
  12. 12. CLUES 1. Helena wants to __ the cookies equally among her friends. 2. Letters or symbols that stand for unknown numbers are __. 3. A set of related multiplication and division number sentences is called a __. 4. Multiplication and division are opposite, or __ operations. 5. The answer to a division problem is the __. 6. 12 ÷ 6 is an example of an __. 7. The __ is the number that is being divided in a division problem. 8. The number that divides the dividend is the __. 9. Multiply two factors to find the __. 10. Tiles arranged in rows and columns are an __. 11. When groups have the same number of items, you can __ to find out how many there are in all. 12. Numbers that you multiply are __.
  13. 13. WORD LIST <ul><li>DIVIDE </li></ul><ul><li>VARIABLES </li></ul><ul><li>FACT FAMILY </li></ul><ul><li>INVERSE </li></ul><ul><li>QUOTIENT </li></ul><ul><li>EXPRESSION </li></ul><ul><li>DIVIDEND </li></ul><ul><li>DIVISOR </li></ul><ul><li>PRODUCT </li></ul><ul><li>ARRAY </li></ul><ul><li>MULTIPLY </li></ul><ul><li>FACTORS </li></ul>
  14. 14. Activity 2 : DIVISIBILITY RULES 5, 6 and 9
  15. 15. A number is divisible by: IF…… The sum of the umber’s digits is 9 9 The number is also divisible by 2 and 3 6 The number ends in 0 or 5 5
  16. 16. Dividing by 5 RULE: If a number ends in 0 or 5 then the number is divisible by 5 <ul><li>50 </li></ul><ul><li>5 250 </li></ul><ul><li>- 25 </li></ul><ul><li>000 </li></ul><ul><li>0 </li></ul><ul><li>0 </li></ul>YES 250 What is the last digit? 0
  17. 17. Try this number: 75 <ul><li>15 </li></ul>5 75 -5 25 -25 0
  18. 18. Try this number: 362 <ul><li>72 </li></ul><ul><li>5 362 - 35 12 - 10 2 remainder </li></ul>
  19. 19. Dividing by 6 RULE: If a number is divisible by 2 and 3, then it is also divisible by 6 <ul><li>43 </li></ul><ul><li>6 258 </li></ul><ul><li>- 24 </li></ul><ul><li>18 </li></ul><ul><li>-18 </li></ul><ul><li>0 </li></ul>YES 258 Is the number divisible by 2 and 3 ?
  20. 20. Try this number: 127 <ul><li>22 </li></ul>6 127 -12 17 - 12 5 remainder
  21. 21. Try this number: 246 <ul><li>41 6 246 </li></ul><ul><li>- 24 </li></ul><ul><li>06 </li></ul><ul><li> - 6 </li></ul><ul><li> 0 </li></ul>
  22. 22. Dividing by 9 RULE: If the sum of the digits is 9, then the number is divisible by 9 <ul><li>25 </li></ul><ul><li>9 225 </li></ul><ul><li>- 18 </li></ul><ul><li>45 </li></ul><ul><li>-45 </li></ul><ul><li>0 </li></ul>YES 225 Sum of the digits: 2+2+5=9
  23. 23. Try this number: 621 <ul><li>69 9 621 </li></ul><ul><li>- 54 </li></ul><ul><li>81 </li></ul><ul><li> - 81 </li></ul><ul><li> 0 </li></ul>
  24. 24. Try this number: 563 <ul><li>62 9 563 </li></ul><ul><li>- 54 </li></ul><ul><li>23 </li></ul><ul><li> - 18 </li></ul><ul><li> 5 remainder </li></ul>
  25. 25. Link to other website <ul><li>http:// www.playkidsgames.com/mathGames.htm </li></ul><ul><li>http://www.321know.com/div.htm </li></ul><ul><li>http://oswego.org/ocsd-web/games/mathmagician/mathsdiv.htm </li></ul><ul><li>http://www.quia.com/jg/65651.htm </li></ul><ul><li>http:// www.gamequarium.com/math.htm </li></ul>

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