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Do Now - 11/17 Find the LCM of the following expressions. 3x 2 y and 12xy

Chapter 5 2 Decimals to Fractions

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Page 1: Chapter 5 2 Decimals to Fractions

Do Now - 11/17Find the LCM of the following expressions.

3x2y and 12xy

Page 2: Chapter 5 2 Decimals to Fractions

Agenda Wednesday, Nov. 17

Homework Check

homework 6 p. 244 # 1 - 15

Please be sure to have the number of people attending your Thanksgiving meal, your menu and grocery list for tomorrow.

5-2 Writing fractions as decimals

Page 3: Chapter 5 2 Decimals to Fractions

HW CHECK p. 239 # 3 - 17, 22 - 30, 41 - 46

3. 12, 20 LCM = 60

4. 5, 9 LCM = 45

5. 10, 36 LCM = 180

6. 7, 12 LCM = 84

7. 5, 6 LCM = 30

8. 5, 6 ,7 LCM = 210

9. in 21 days (LCM of 3 & 7)

10. 20, 36 LCM = 180

11. 15, 27 LCM = 135

12. 8, 14, 20 LCM = 280

13. 5, 12, 15 LCM = 60

14. 12x, 40y LCM = 120xy

15. 8x, 25y LCM =200xy

16. 2b2, 6c3 LCM =6b2c3

17. 6a3, 8a LCM = 24a3

22.

23.

24.

25.

Page 4: Chapter 5 2 Decimals to Fractions

HW CHECK p. 239 # 3 - 17, 22 - 30, 41 - 46

26. Maria,

27.

28.

29.

30.

41. 45, 120, 150 LCM = 1,800

42. 2, 5, 12, 15 LCM = 60

43. 12x, 40 LCM = 120x

44. 7ab, 8a3b2, 10a4

LCM = 280a4b2

45. 8x, 18xy LCM = 72xy

46. 9b3, 12bc2 LCM= 36b3c2

Page 5: Chapter 5 2 Decimals to Fractions

lowest common denominator

is the same as

least common multiple

Page 6: Chapter 5 2 Decimals to Fractions
Page 7: Chapter 5 2 Decimals to Fractions
Page 8: Chapter 5 2 Decimals to Fractions
Page 9: Chapter 5 2 Decimals to Fractions
Page 10: Chapter 5 2 Decimals to Fractions
Page 11: Chapter 5 2 Decimals to Fractions
Page 12: Chapter 5 2 Decimals to Fractions
Page 13: Chapter 5 2 Decimals to Fractions

To express a fraction as a decimal, divide the numerator by the denominator.

Write as a decimal. means 3 ÷ 4. The fraction

can be written as 0.75, since 3 ÷ 4 = 0.75.

Next

Page 14: Chapter 5 2 Decimals to Fractions

Denominator and the numerator.

3Numerator

4Denominator

34

Page 15: Chapter 5 2 Decimals to Fractions

1 Write each fraction as a decimal.

2/

5

Page 16: Chapter 5 2 Decimals to Fractions

2 Write each fraction as a decimal. Round to the nearest ten thousandths if necessary.

- 43/

1 0

Page 17: Chapter 5 2 Decimals to Fractions

4

9

1

10

5

1111

20

4

5

5

8 0.8

0.45

0.1

0.55

0.625

0.4

Match fractions and decimals