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CRCT Review: Numbers & Operations

CRCT Review: Numbers & Operations. Factors, Multiples, & Prime Factorization 100. Which choice shows ALL the factors of 45? 5, 9 1, 5, 9, 45 1, 3, 5, 9, 15, 45 1, 3, 4, 5, 9, 15, 45. Factors, Multiples, & Prime Factorization 100 Answer. C. 1, 3, 5, 9, 15, 45.

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CRCT Review: Numbers & Operations

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  1. CRCT Review:Numbers & Operations

  2. Factors, Multiples, & Prime Factorization 100 Which choice shows ALL the factors of 45? • 5, 9 • 1, 5, 9, 45 • 1, 3, 5, 9, 15, 45 • 1, 3, 4, 5, 9, 15, 45

  3. Factors, Multiples, & Prime Factorization 100 Answer C. 1, 3, 5, 9, 15, 45

  4. Factors, Multiples, & Prime Factorization 200 Which number is a multiple of both 5 and 3? • 145 • 260 • 353 • 510

  5. Factors, Multiples, & Prime Factorization200 Answer D. 510 Explanation: use the divisibility rules – 3: sum of digits is divisible by 3 5: ends in 5 or 0

  6. Factors, Multiples, & Prime Factorization 300 Which shows the prime factorization of 90? • 2 x 3 x 15 • 3² x 10 • 2 x 3² x 5 • 9 x 2 x 5

  7. Factors, Multiples, & Prime Factorization300 Answer C. 2 x 3² x 5

  8. Factors, Multiples, & Prime Factorization 400 What is the least common multiple of 9 & 15 A. 3 B. 18 C. 45 D. 90

  9. Factors, Multiples, & Prime Factorization 400 Answer C. 45

  10. Factors, Multiples, & Prime Factorization 500 What is the greatest common factor of 24 and 40? A. 4 B. 8 C. 12 D. 24

  11. Factors, Multiples, & Prime Factorization 500 Answer B. 8

  12. Adding Fractions 100 • B) C) D)

  13. Adding Fractions 100 Answer C)

  14. Adding Fractions 200 Art is reading a book for school. He read ¾ of the book last weekend and 1/8 this morning. What fraction of the book has he read so far? A) B) C) D)

  15. Adding Fractions 200 Answer D)

  16. Adding Fractions 300 Micah needs yds of fabric for one project and yds of fabric for another. How many yds of fabric does she need in all? A) B) C) D)

  17. Adding Fractions 300 Answer D.

  18. Adding Fractions 400 Vinnie is painting a barn. He did 2/3 of the Job last weekend and 1/10 this morning. What fraction of the barn has Vinnie painted? A) B) C) D)

  19. Adding Fractions 400 Answer D)

  20. Adding Fractions 500 A) B) C) D)

  21. Adding Fractions 500Answer C)

  22. Subtracting Fractions 100 A sewing pattern shows that yds of fabric are needed to make a bathrobe. A matching nightshirt needs only yds. How much more fabric is needed for the bathrobe than for the nightshirt? A) B) C) D) 7

  23. Subtracting Fractions 100 Answer A)

  24. Subtracting Fractions 200 Tracy has pints of orange juice. She needs pints to make a punch. How much more Orange juice does she need? A) B) C) D)

  25. Subtracting Fractions 200 Answer B)

  26. Manuel practiced the violin for hours last week. Roger practiced cello for hours. How Much longer did Manuel practice? A) B) C) D) Subtracting Fractions 300

  27. Subtracting Fractions 300 Answer B)

  28. It took George hrs to plant a vegetable garden. Dick planted his garden in just hrs. How much Longer did it take George to plant his garden? A) B) C) D) Subtracting Fractions 400

  29. Subtracting Fractions 400 Answer D)

  30. A) B) C) D) Subtracting Fractions 500

  31. Subtracting Fractions 500Answer A)

  32. Arnold bought yds of string. He used Of it for a craft project. How much string did he use? A) B) C) D) Multiplying & Dividing Fractions 100

  33. Multiplying & Dividing Fractions 100 Answer A)

  34. Multiplying & Dividing Fractions 200 A) B) C) D) 24

  35. Multiplying & Dividing Fractions 200 Answer D) 24

  36. Multiplying & Dividing Fractions 300 Small metal parts each measure 3/16 of an inch. How many of these parts can be cut from a strip of metal that is 30 inches long? A) B) 90 C) 160 D) 270

  37. Multiplying & Dividing Fractions 300 Answer C) 160

  38. Multiplying & Dividing Fractions 400 A) B) C) D)

  39. Multiplying & Dividing Fractions 400 Answer A)

  40. Multiplying & Dividing Fractions 500 A) B) C) 2 D) 3

  41. Multiplying & Dividing Fractions 500 Answer D) 3

  42. Misc. 100 Robert has a stamp collection. He can divide all the stamps in his collection into equal groups of 6 or equal groups of 9. What is the LEAST possible number of stamps that could be in his collection? A) 9 B) 18 C) 36 D) 54

  43. Misc. Answer 100 B) 18

  44. Misc. 200 For a concert, 80 singers will stand on risers. The director wants to divide the singers so that there are equal numbers of singers standing on each riser. Which is NOT a possible way to divide the 80 singers Among the risers? • 4 risers with 20 singers each B) 5 risers with 16 singers each C) 6 risers with 12 singers each D) 8 risers with 10 singers each

  45. Misc. Answer 200 C) 6 risers with 12 singers each

  46. Misc. 300 Sal bought these items at the school store. Binder $3.50 Notebook $1.25 Pencil $0.10 How much change did he receive from $10.00? • $6.85 B) $5.15 C) $4.85 D) $4.25

  47. Misc. Answer 300 B) $5.15

  48. Misc. 400 Shelly found that 36% of the students she surveyed said chocolate was their favorite ice cream flavor. What fraction is equivalent to 36%? A) B) C) D)

  49. Misc. Answer 400 A)

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