Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Discov Divisibility Rules
Document related concepts
no text concepts found
Transcript
These numbers are all divisible by 2. Can you see why? •4 Here’s a hint -- • 18 • 912 • 636 • 9,720 The ones digit is even! • A number is divisible by 2 if the ones digit is even. Are these numbers divisible by 2? 5 82 NO YES 917 5,276 NO YES 8,478,184 YES These numbers are all divisible by 3. Can you see why? •9 Here’s a hint – • 63 **Add up the digits of each number** • 714 • 225 • 9,720 The sum of the digits is divisible by 3! • A number is divisible by 3 if the sum of the digits is divisible by 3. Are these numbers divisible by 3? 7 27 824 NO YES NO 271,360 NO 9,265,689 YES These numbers are all divisible by 4. Can you see why? • 16 Here’s a hint -- • 912 • 720 • 8,224 • 917,532 If the last two digits form a number divisible by 4! • A number is divisible by 4 if the last two digits form a number divisible by 4. Are these numbers divisible by 4? 15 NO 240 YES 1,693 4,408 NO YES 12,982,540 YES These numbers are all divisible by 5. Can you see why? • 15 Here’s a hint -- • 280 • 2,475 • 82,470 • 153,645 The ones digit is a 0 or 5! • A number is divisible by 5 if the ones digit is a 0 or 5. Are these numbers divisible by 5? 15 YES 240 YES 1,693 4,408 NO NO 12,982,540 YES These numbers are all divisible by 6. Can you see why? • 48 • 90 • 174 • 1,044 • 39,720 Here’s a hint – **Think about our other rules and what two numbers are factors of 6.** The number is divisible by both 2 and 3! • A number is divisible by 6 if the number is divisible by both 2 and 3. Are these numbers divisible by 6? 135 NO 462 YES 7,026 50,319 YES NO 12,982,440 YES These numbers are all divisible by 9. Can you see why? • 18 Here’s a hint – • 612 **Add up the digits of each number** • 7,443 • 81,225 • 99,720 The sum of the digits is divisible by 9! • A number is divisible by 9 if the sum of the digits is divisible by 9. Are these numbers divisible by 9? 72 YES 183 NO 1,287 YES 189,101 NO 12,982,440 NO These numbers are all divisible by 10. Can you see why? • 50 Here’s a hint -- • 240 • 8,770 • 42,420 • 153,640 The ones digit is 0! • A number is divisible by 10 if the ones digit is 0. Are these numbers divisible by 10? 70 YES 183 NO 1,280 YES 189,101 NO 142,982,530 YES Determine whether each number is divisible by 2, 3, 4, 5, 6, 9, or 10. 712 2, 4 1,035 32,221 8,340 3, 5, 9 none 2, 3, 4, 5, 6, 10 Assignment • Divisibility Rules WS You can do it!
Related documents