2, 3, 4, 5, 6, 9, 10 Divisibility Rules
“ Divisible BY” What does it mean?
<ul><li>“ Divisible by” means: </li></ul><ul><li>If  you divide one number by another, the result is a whole number WITHOU...
Divisibility Rule 2 <ul><li>A number is divisible by 2 if the last digit is even.  (0, 2, 4, 6, 8) </li></ul><ul><li>Examp...
Now  You Try: <ul><li>Which number  IS NOT  divisible by 2? </li></ul><ul><li>572 1464 249 </li></ul>Need More Practice:  ...
WONDERFUL
It ends in a 0, 2, 4, 6, or 8.
Divisibility Rule 3 <ul><li>A number is divisible by three if the sum of the digits is divisible by 3. </li></ul><ul><li>E...
Now  You Try: <ul><li>Which number  IS NOT  divisible by 3? </li></ul><ul><li>572 1464 279 </li></ul>Need More Practice:  ...
The sum is  divisible by 3.
WONDERFUL
Divisibility Rule 4 <ul><li>A number is divisible by 4 if the last two digits are divisible by 4. </li></ul><ul><li>Exampl...
Now  You Try: <ul><li>Which number  IS NOT  divisible by 4? </li></ul><ul><li>564 4101 188 </li></ul>Need More Practice:  ...
WONDERFUL
The last 2 digits are  divisible by 4.
Divisibility Rule 5 <ul><li>A number is divisible by 5 if the last digit is a 0 or 5. </li></ul><ul><li>Examples: </li></u...
Now You Try: <ul><li>Which number  IS NOT  divisible by 5? </li></ul><ul><li>9820   779   560 </li></ul>Need More Practice...
The number ends in a zero or a five.
Wonderful
Divisibility Rule 6 <ul><li>A number is divisible by 6 when it is divisible by 2  AND  3. (prime numbers) </li></ul><ul><l...
Now You Try: <ul><li>Which number  IS NOT  divisible by 6? </li></ul><ul><li>8700 523   7602 </li></ul><ul><li>Need more p...
Way To Go!!
This number is divisible by  2 and 3.
Divisibility Rule 9 <ul><li>A number is divisible by 9 if the sum of the digits is divisible by 9. </li></ul><ul><li>Examp...
Now You Try: <ul><li>Find the number that  IS NOT  divisible by 9. </li></ul><ul><li>9873 636 5541 </li></ul><ul><li>Need ...
The sum of the digits is  divisible by 9.
Great Job!!!
Divisibility Rule 10 <ul><li>A number is divisible by 10 is it ends in a ZERO. </li></ul><ul><li>Example: </li></ul><ul><l...
Now You Try: <ul><li>Find the number that  IS   NOT  divisible   by ten. </li></ul><ul><li>56,920   7537 870 </li></ul>
The number ends in a ZERO.
Way To Go!!
Congratulations! <ul><li>Complete two of the three assignments.  You may complete them on your computers but print out you...
Now that you have completed your two assignments,  feel free to go to the following sites.  THEY ARE SOOOOO MUCH FUN!!!!!!...
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Divisability rules

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Transcript of "Divisability rules"

  1. 1. 2, 3, 4, 5, 6, 9, 10 Divisibility Rules
  2. 2. “ Divisible BY” What does it mean?
  3. 3. <ul><li>“ Divisible by” means: </li></ul><ul><li>If you divide one number by another, the result is a whole number WITHOUT a remainder. </li></ul><ul><li>Examples: </li></ul><ul><li>12 ÷ 6 = 2 No remainder </li></ul><ul><li>15 ÷ 5 = 3 No remainder </li></ul>
  4. 4. Divisibility Rule 2 <ul><li>A number is divisible by 2 if the last digit is even. (0, 2, 4, 6, 8) </li></ul><ul><li>Examples: 7 8 347 0 </li></ul><ul><li>Review Even numbers: ghosteven </li></ul>
  5. 5. Now You Try: <ul><li>Which number IS NOT divisible by 2? </li></ul><ul><li>572 1464 249 </li></ul>Need More Practice: Numbers Divisible by 2
  6. 6. WONDERFUL
  7. 7. It ends in a 0, 2, 4, 6, or 8.
  8. 8. Divisibility Rule 3 <ul><li>A number is divisible by three if the sum of the digits is divisible by 3. </li></ul><ul><li>Examples: </li></ul><ul><li>75 7 + 5 = 12 12 ÷ 3 = 4 No Remainder </li></ul><ul><li>369 3 +6 + 9 = 18 18 ÷ 3 = 6 No Remainder </li></ul>
  9. 9. Now You Try: <ul><li>Which number IS NOT divisible by 3? </li></ul><ul><li>572 1464 279 </li></ul>Need More Practice: Numbers Divisible by 3
  10. 10. The sum is divisible by 3.
  11. 11. WONDERFUL
  12. 12. Divisibility Rule 4 <ul><li>A number is divisible by 4 if the last two digits are divisible by 4. </li></ul><ul><li>Examples: </li></ul><ul><li>13 20 20 ÷ 4 = 5 </li></ul><ul><li>6 72 72 ÷ 4 = 18 </li></ul>
  13. 13. Now You Try: <ul><li>Which number IS NOT divisible by 4? </li></ul><ul><li>564 4101 188 </li></ul>Need More Practice: Numbers Divisible by 4
  14. 14. WONDERFUL
  15. 15. The last 2 digits are divisible by 4.
  16. 16. Divisibility Rule 5 <ul><li>A number is divisible by 5 if the last digit is a 0 or 5. </li></ul><ul><li>Examples: </li></ul><ul><li>61 5 ends in a 5 </li></ul><ul><li>148 0 ends on a 0 </li></ul>
  17. 17. Now You Try: <ul><li>Which number IS NOT divisible by 5? </li></ul><ul><li>9820 779 560 </li></ul>Need More Practice: Numbers Divisible by 5
  18. 18. The number ends in a zero or a five.
  19. 19. Wonderful
  20. 20. Divisibility Rule 6 <ul><li>A number is divisible by 6 when it is divisible by 2 AND 3. (prime numbers) </li></ul><ul><li>Examples: </li></ul><ul><li>408 ends in an even number (2 rule) </li></ul><ul><li>sum of the digits is divisible by 3 </li></ul><ul><li>Review prime and composite numbers: Prime and Composite Numbers </li></ul>
  21. 21. Now You Try: <ul><li>Which number IS NOT divisible by 6? </li></ul><ul><li>8700 523 7602 </li></ul><ul><li>Need more practice? Numbers Divisible by 6 </li></ul>
  22. 22. Way To Go!!
  23. 23. This number is divisible by 2 and 3.
  24. 24. Divisibility Rule 9 <ul><li>A number is divisible by 9 if the sum of the digits is divisible by 9. </li></ul><ul><li>Examples: </li></ul><ul><li>963 9 + 6 + 3 = 18 18 ÷ 9 = 2 </li></ul><ul><li>5445 5 + 4 + 4 + 5 =18 18 ÷ 9 =2 </li></ul>
  25. 25. Now You Try: <ul><li>Find the number that IS NOT divisible by 9. </li></ul><ul><li>9873 636 5541 </li></ul><ul><li>Need More Practice: Numbers Divisible by 9 and 10 </li></ul>
  26. 26. The sum of the digits is divisible by 9.
  27. 27. Great Job!!!
  28. 28. Divisibility Rule 10 <ul><li>A number is divisible by 10 is it ends in a ZERO. </li></ul><ul><li>Example: </li></ul><ul><li>763 0 ends in a zero </li></ul><ul><li> 41 0 ends in a zero </li></ul>
  29. 29. Now You Try: <ul><li>Find the number that IS NOT divisible by ten. </li></ul><ul><li>56,920 7537 870 </li></ul>
  30. 30. The number ends in a ZERO.
  31. 31. Way To Go!!
  32. 32. Congratulations! <ul><li>Complete two of the three assignments. You may complete them on your computers but print out your answer sheet. </li></ul><ul><li>Assignment 1.doc </li></ul><ul><li>chart.doc </li></ul><ul><li>assignment3.doc </li></ul>
  33. 33. Now that you have completed your two assignments, feel free to go to the following sites. THEY ARE SOOOOO MUCH FUN!!!!!! Fractions vectorkids -divisibility rules Gamequarium Division Games

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