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4-1. Divisibility. Course 1. Warm Up. Problem of the Day. Lesson Presentation. 4-1. Divisibility. Course 1. Learn to use divisibility rules. 4-1. 9/19/13 Divisibility-Starter. Course 1. S : Warm Up: 1 .) Brianna bought a basketball on sale for $15,

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  1. 4-1 Divisibility Course 1 Warm Up Problem of the Day Lesson Presentation

  2. 4-1 Divisibility Course 1 Learn to use divisibility rules.

  3. 4-1 9/19/13 Divisibility-Starter Course 1 S: Warm Up: 1.) Brianna bought a basketball on sale for $15, which was 1/5 off the original price. What decimal represents the discount she received? A. 1.5 B. 0.05 C. 0.15 D.0.20 2.) Write 0.8 as a fraction. 3.) Order the following decimals from least to greatest. 0.5, 0.047, 0.05, 0.46.

  4. 4-1 Divisibility- Practice Course 1 Insert Lesson Title Here Vocabulary divisible composite number prime number

  5. 4-1 Divisibility Course 1 A number is divisible by another number if the quotient is a whole number with no remainder. 42 ÷ 6 = 7 Quotient

  6. 4-1 Divisibility Course 1 composite numbers Numbers that are divisible by more than two numbers. A number greater than 1, divisible by at least two numbers. Prime numbers are divisible by only itself and 1. Ex. 11 is a prime number because it is divisible by only 1 and 11. *The numbers 0 and 1 are neither prime nor composite.

  7. 4-1 Divisibility-Application Course 1

  8. 4-1 Divisibility Course 1 Additional Example 1A: Checking Divisibility Tell whether 462 is divisible by 2, 3, 4, and 5. The last digit, 2, is even. Divisible The sum of the digits is 4 + 6 + 2 = 12. 12 is divisible by 3. Divisible Not divisible The last two digits form the number 62. 62 is not divisible by 4. Not divisible The last digit is 2. So 462 is divisible by 2 and 3.

  9. 4-1 Divisibility Course 1 Additional Example 1B: Checking Divisibility Tell whether 540 is divisible by 6, 9, and 10. The number is divisible by both 2 and 3. Divisible The sum of the digits is 5 + 4 + 0 = 9. 9 is divisible by 9. Divisible The last digit is 0. Divisible So 540 is divisible by 6, 9, and 10.

  10. 4-1 Divisibility Course 1 Check It Out: Example 1A Tell whether 114 is divisible by 2, 3, 4, and 5. The last digit, 4, is even. Divisible The sum of the digits is 1 + 1 + 4 = 6. 6 is divisible by 3. Divisible The last two digits form the number 14. 14 is not divisible by 4. Not Divisible Not Divisible The last digit is 4. So 114 is divisible by 2 and 3.

  11. 4-1 Divisibility Course 1 Check It Out: Example 1B Tell whether 810 is divisible by 6, 9, and 10. The number is divisible by both 2 and 3. Divisible The sum of the digits is 8 + 1 + 0 = 9. 9 is divisible by 9. Divisible The last digit is 0. Divisible So 810 is divisible by 6, 9, and 10.

  12. 4-1 Divisibility- Connection Course 1 Click to see which numbers from 1 through 50 are prime.

  13. 4-1 Divisibility Course 1 Additional Example 2: Identifying Prime and Composite Numbers Tell whether each number is prime or composite. A. 23 divisible by 1, 23 prime B. 48 divisible by 1, 2, 3, 4, 6, 8, 12, 16, 24, 48. composite

  14. 4-1 Divisibility Course 1 Additional Example 2: Identifying Prime and Composite Numbers Tell whether each number is prime or composite. C. 31 divisible by 1, 31 prime D. 18 divisible by 1, 2, 3, 6, 9, 18 composite

  15. 4-1 Practice

  16. 4-1 Divisibility-Exit Course 1 Insert Lesson Title Here Lesson Quiz Tell whether each number is divisible by 2, 3, 4, 5, 6, 9, and 10. 1. 256 2. 720 3. 615 Tell whether each number is prime or composite. 4. 47 5. 38 divisible by 2, 4 divisible by 2, 3, 4, 5, 6, 9, 10 divisible by 3, 5 composite prime

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