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## Math Review

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**Math Review**Unit 1 Investigations**Prime and Composite Numbers**Prime Numbers: ONLY have two factors of one and itself. Practice Problem Question: Which of the following Numbers are prime? • 24 • 13 • 16 • 9**Prime and Composite Numbers**• Composite Numbers: Have MORE than two factors. Practice Problem Question: Which of the following numbers is a composite number? • 7 • 5 • 30 • 19**Word Problems**• Tip: Word problems do not have to be overwhelming. Take a deep breathe and visualize the problem in your mind. Don’t forget to reread the problem if you need to for comprehension. Let’s Practice Word Problems!!!!**Practice One**Part A: Jordynalways takes the same route when she walks her dog. First, she walks 7 blocks to the park. Then she walks 9 blocks to the elementary school. How many blocks does Jordyn'sdog walk each day? Part B: If Jordyn decides to walk her dog twice a day for ten days, how many blocks will have Jordyn walked her dog?**Practice #2**In the magazine aisle at the grocery store there are 17 rows of magazines. In each row there are 13 magazines. How many magazines are in the aisle?**Practice #3**Rebecca babysat for 15 weeks over the summer. She earned $75 each week. How much did Rebecca earn in all?**Challenge Problem!!!**8 ghouls each had 8 hands. Each hand had 8 warts and each wart had 8 hairs. How many hairs were there?**Spiral Review: Properties**• Which of the following expressions would go in the to demonstrate the associative property of multiplication? 12 × (8 × 14) = • (12 + 8) × 14 • (12 × 8) × 14 • (12 + 14) + 8 • 12 × (14 × 8)**Sprial Review: Properties**Which property of whole numbers is demonstrated in the number sentence below? 16 + 25 = 25 + 16 Commutative property of addition Identity property of addition Commutative property of multiplication D. Associative property of addition**Spiral Review: Properties**Which number sentence below demonstrates the identity property of multiplication? 16 × 18 = 18 × 16 (16 + 18) + 0 = 16 + 18 (16 × 18) × 1 = 16 × 18 (16 + 18) × 0 = 0**Spiral Review: Place Value**Which number is greater than 415.043? 415.009 415.051 415.041 415.039**Spiral Review: Place Value**Which statement below is true? 375,897 > 375,899 245,717 < 245,599 485,590 > 485,499 179,990 < 178,995**Spiral Review: Expanded Notation**• Write in Standard Form: • 1. 2,000 + 400 + 30 + 5 = • 6,000 + 600 + 4 = • Write in Expanded Form: • 3.560.23 • 4. 1,212.45