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# 2nd9 Interim Review Pp

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### 2nd9 Interim Review Pp

1. 1. Interim Review<br />12/16/09<br />
2. 2. What is the difference between a prime number and a composite number? Give 3 examples of each.<br />
3. 3. What is the divisibility rule for the following numbers… <br /> 3 4<br />5 6 9 10<br />
4. 4. What is prime factorization? Write the prime factorization of each of the following numbers… <br /> 36 54 99<br />
5. 5. Define FACTORS: whole numbers that are multiplied to find a product (answer)<br />For example: 2x3=6… therefore 2 and 3 are factors of 6<br />
6. 6. What does Greatest Common Factor mean?<br />
7. 7. The greatest common factor of two or more numbers is the greatest number that is a factor of every number <br />
8. 8. Find the GCF of 18 and 36<br />
9. 9. 1. Make a list to find the GCF of 18 and 3018: 1, 2, 3, 6, 9, 1830: 1, 2, 3, 5, 6, 10, 15, 30<br />THE GCF of 18 and 30 is 6.<br />
10. 10. What does Least Common Multiple mean?<br />
11. 11. A Multiple of a number is the product of that number and a nonzero whole number.2 x 1 = 22 x 2 = 42 x 3 = 62, 4, 6 are multiples of 2.<br />
12. 12. Find the LCM of:<br />12 and 24<br />
13. 13. METHOD 1<br />Make a list of the first few multiples of each number.<br />The smallest number on both (all) lists is the LCM.<br />12 – 12, 24, 36, 48, 60<br />24 – 24, 48, 72, 96, 120 <br />
14. 14. What is the difference between an improper fraction and a mixed number?<br />GIVE 3 EXAMPLES OF EACH<br />
15. 15. How can I add and subtract fractions with like denominators?<br />
16. 16. What does Least Common Denominator mean?<br />What do you need to add and subtract fractions?<br />
17. 17. How do you regroup mixed numbers for subtraction?<br />6 and 5/12 – 2 and 7/12=<br />7 and 2/3 – 2 and 5/6 =<br />
18. 18. How do you multiply fractions?<br />
19. 19. How do you divide fractions?<br />
20. 20. What is a ratio?<br />Write 3 equivalent ratios to ⅖<br />
21. 21. Solve the following proportions… <br />6/14 = A/7 5/A = 7/77<br />
22. 22. What is a percent?<br />Write the following percentages as fractions in simplest form… 25% 45% 90%<br />
23. 23. How do I change a percent to a decimal?<br />Change the following percents to decimals…<br />7% 22% 60% 70.4%<br />
24. 24. How do I change a decimal to a percent?<br />Change the following decimals to percents…<br />.18 .008 .2 .143<br />