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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 A number is divisible by 2 if the last digit is even. (0, 2, 4, 6, 8) Examples: 78 Review Even numbers: ghosteven 3470 Now You Try: Which number IS NOT divisible by 2? 572 1464 Need More Practice: Numbers Divisible by 2 249 WONDERFUL It ends in a 0, 2, 4, 6, or 8. Divisibility Rule 3 A number is divisible by three if the sum of the digits is divisible by 3. Examples: 75 369 7 + 5 = 12 12 ÷ 3 = 4 No Remainder 3 +6 + 9 = 18 18 ÷ 3 = 6 No Remainder Now You Try: Which number IS NOT divisible by 3? 572 1464 Need More Practice: Numbers Divisible by 3 279 The sum is divisible by 3. WONDERFUL 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 Now You Try: Which number IS NOT divisible by 4? 564 4101 Need More Practice: Numbers Divisible by 4 188 WONDERFUL The last 2 digits are divisible by 4. Divisibility Rule 5 A number is divisible by 5 if the last digit is a 0 or 5. Examples: 615 1480 ends in a 5 ends on a 0 Now You Try: Which number IS NOT divisible by 5? 9820 779 Need More Practice: Numbers Divisible by 5 560 The number ends in a zero or a five. Wonderful 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 Now You Try: Which number IS NOT divisible by 6? 8700 523 Need more practice? Numbers Divisible by 6 7602 Way To Go!! This number is divisible by 2 and 3. 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 Now You Try: Find the number that IS NOT divisible by 9. 9873 636 5541 Need More Practice: Numbers Divisible by 9 and 10 The sum of the digits is divisible by 9. Great Job!!! 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 Now You Try: Find the number that IS NOT divisible by ten. 56,920 7537 870 The number ends in a ZERO. Way To Go!! Congratulations! Complete two of the three assignments. You may complete them on your computers but print out your answer sheet. Assignment 1.doc chart.doc assignment3.doc 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