Math 5 Unit Review

1. Math 5Unit Review Instructor: Mrs. Tew Turner

2. In this lesson we will review for the unit assessment and learn about test taking strategies.

3. Math Warm-up Use a drawing to help you solve this problem. A frog is at the bottom of an 8 foot well. Every day he crawls up 3 feet, but at night he slips down 2 feet. How many days will it take for him to get out of the well?

4. Math Warm-up Use a drawing to help you solve this problem. A frog is at the bottom of an 8 foot well. Every day he crawls up 3 feet, but at night he slips down 2 feet. How many days will it take for him to get out of the well? It will take the frog 8 days to get out of the well.

5. In this unit you learned about place value, decimals, patterns in the base 10 number system, and representing place value with exponents. Today we will review all that you have learned, as well as go over test taking strategies.

6. Place Value Review

7. Do you remember this place value chart? Let’s review the place values in order.

8. What is the value of digit 8 in 2,397,823? What is the place of digit 8? What is the value of digit 2? What is the place of digit 2?

9. Decimal Review

10. Do you remember this part of the place value chart? It shows the decimal places. Let’s read them together.

11. Read this number: 1.982 You say, “One AND Nine hundred eighty two thousandths.” Remember that you say AND for the decimal point. The decimal part is read with a ‘THS’ at the end.

12. Now lets work on recognizing and saying these numbers. Why are they less than one? 0.04 = Four Hundredths = this means you have 4 out of 100 items = 4/100 0.3 = Three Tenths = this means you have 3 out of 10 items = 3/10

13. Rounding Decimals Review

14. How do you round 1.47 to the nearest tenth? Step 1 Find the rounding place. 1.47 (We are rounding to the nearest tenth, so underline the tenths place.)

15. How do you round 1.47 to the nearest tenth? Step 2 Look at the digit to the right of the rounding place 1.47 (We are rounding to the nearest tenth, so we circle the thousandths place.)

16. How do you round 1.47 to the nearest tenth? Step 3 If the digit to the right of the rounding digit is less than 5, then leave the rounding digit. If the digit is 5 or greater, then add one to the rounding digit. 1.47 would be 1.50 (The digit we are looking at is 7, which is greater than 5. We would change the rounding digit to a 5.)

17. How do you round 1.47 to the nearest tenth? Step 4 *This is where it is different than rounding whole numbers.* Drop the digits to the right of the rounding digit. 1.50 = 1.5 (We dropped the digit in the thousandths place.)

18. Comparing and Ordering Decimals Review

19. How can you compare decimals that are written to different place values? Let’s compare the decimals 6.8 and 6.804. Step 1 Line up the decimal points. 6.8 6.804

20. How can you compare decimals that are written to different place values? Let’s compare the decimals 6.8 and 6.804. Step 2 Add zeros to the end of the number that has fewer decimal places until it is even with the other number. 6.800 6.804

21. How can you compare decimals? Let’s compare the decimals 6.8 and 6.804. Step 3 Compare digits of the same place value, starting at the left. 6.800 6.804

22. How can you compare decimals? Let’s compare the decimals 6.8 and 6.804. Step 4 Keep comparing digits as you move to the right until you find digits that are different. 6.800 6.804

23. Order the following numbers from least to greatest: 2.812, 2.809, 2.730 Step 1: Line up the decimal points 2.812 2.809 2.730 2.741

24. Order the following numbers from least to greatest: 2.812, 2.809, 2.730 Step 2: Compare digits of the same place value beginning at the left. 2.812 2.730 2.809

25. Order the following numbers from least to greatest: 2.812, 2.809, 2.730 Step 2: Compare digits of the same place value beginning at the left. 2.812 2.730 this number is the least 2.809

26. Order the following numbers from least to greatest: 2.812, 2.809, 2.730 Step 3: Continue to compare digits of the same place value beginning at the left. 2.812 2.730 2.809this number is the least

27. Order the following numbers from least to greatest: 2.812, 2.809, 2.730 Step 4: Write the numbers from least to greatest. 2.730, 2.809, 2.812

28. Patterns in Base 10 Review

29. As you move to the right in the base 10 system, the place is divided by 10. As you move to the left in the base 10 system, the place is multiplied by 10. We can use this information to answer questions such as “how many thousands are in 10 millions?”

30. We can use this information to answer questions such as “how many thousands are in 10 millions?” We can look at the place value chart to figure out how many thousands are in a million. M, HTh, TTh, Th, H, T, O x10 x10 x10

31. We can use this information to answer questions such as “how many thousands are in 10 millions?” We can see that there are 10x10x10 thousands in one million, or 100 thousands in one million. M, HTh, TTh, Th, H, T, O x10 x10 x10

32. We can use this information to answer questions such as “how many thousands are in 10 millions?” So, there are 10 x 100 thousands in 10 million. Our answer is 1,000 thousands in one million. M, HTh, TTh, Th, H, T, O x10 x10 x10

33. Exponents Review

34. The exponent tells you how many times you multiply the base times itself. 10 base: 10 exponent: 2 10 x 10 (the base times itself 2 times) 2

35. Test Taking Strategies (Write these in your Math Notebook) Read each problem twice Underline key words Underline the information you need to solve a problem. Circle any data that is provided.

36. Test Taking Strategies (Write these in your Math Notebook) Solve the problem Show your work as you solve the problem. Check your work Use estimation to check if your answer is reasonable.

37. Good Work with this lesson. Today you reviewed for the unit assessment and learned about test taking strategies.