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Divisibility Rules

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lysander-theron
31 diapositives · 1.6K Views · Nov 03, 2014

Divisibility Rules. 2, 3, 4, 5, 6, 9, 10. “Divisible BY” What does it mean?. “Divisible by” means: If you divide one number by another, the result is a whole number WITHOUT a remainder. Examples: 12 ÷ 6 = 2 No remainder 15 ÷ 5 = 3 No remainder. Divisibility Rule 2.

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Divisibility Rules
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  1. Divisibility Rules

  2. 2, 3, 4, 5, 6, 9, 10

  3. “Divisible BY”What does it mean?

  4. “Divisible by” means: If you divide one number by another, the result is a whole number WITHOUT a remainder. Examples: 12 ÷ 6 = 2 No remainder 15 ÷ 5 = 3 No remainder

  5. Divisibility Rule 2 A number is divisible by 2 if the last digit is even. (0, 2, 4, 6, 8) Examples: 78 3470 Review Even numbers: ghosteven

  6. Now You Try: Which number IS NOT divisible by 2? 572 1464 249 Need More Practice: Numbers Divisible by 2

  7. WONDERFUL

  8. It ends in a 0, 2, 4, 6, or 8.

  9. Divisibility Rule 3 A number is divisible by three if the sum of the digits is divisible by 3. Examples: 75 7 + 5 = 12 12 ÷ 3 = 4 No Remainder 369 3 +6 + 9 = 18 18 ÷ 3 = 6 No Remainder

  10. Now You Try: Which number IS NOT divisible by 3? 572 1464 279 Need More Practice: Numbers Divisible by 3

  11. The sum is divisible by 3.

  12. WONDERFUL

  13. Divisibility Rule 4 A number is divisible by 4 if the last two digits are divisible by 4. Examples: 1320 20 ÷ 4 = 5 672 72 ÷ 4 = 18

  14. Now You Try: Which number IS NOT divisible by 4? 564 4101 188 Need More Practice: Numbers Divisible by 4

  15. WONDERFUL

  16. The last 2 digits are divisible by 4.

  17. Divisibility Rule 5 A number is divisible by 5 if the last digit is a 0 or 5. Examples: 615 ends in a 5 1480 ends on a 0

  18. Now You Try: Which number IS NOT divisible by 5? 9820 779 560 Need More Practice: Numbers Divisible by 5

  19. The number ends in a zero or a five.

  20. Wonderful

  21. Divisibility Rule 6 A number is divisible by 6 when it is divisible by 2 AND 3. (prime numbers) Examples: 408 ends in an even number (2 rule) sum of the digits is divisible by 3 Review prime and composite numbers:Prime and Composite Numbers

  22. Now You Try: Which number IS NOT divisible by 6? 8700 523 7602 Need more practice? Numbers Divisible by 6

  23. Way To Go!!

  24. This number is divisible by 2 and 3.

  25. Divisibility Rule 9 A number is divisible by 9 if the sum of the digits is divisible by 9. Examples: 963 9 + 6 + 3 = 18 18 ÷ 9 = 2 5445 5 + 4 + 4 + 5 =18 18 ÷ 9 =2

  26. Now You Try: Find the number that IS NOT divisible by 9. 9873 636 5541 Need More Practice: Numbers Divisible by 9 and 10

  27. The sum of the digits is divisible by 9.

  28. Great Job!!!

  29. Divisibility Rule 10 A number is divisible by 10 is it ends in a ZERO. Example: 7630 ends in a zero 410 ends in a zero

  30. Now You Try: Find the number that ISNOT divisibleby ten. 56,920 7537 870

  31. Way To Go!!