Chapter 5 2 Decimals to Fractions

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

2. 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

3. HW CHECK p. 239 # 3 - 17, 22 - 30, 41 - 46
3. 12, 20LCM = 60
4. 5, 9 LCM = 45
5. 10, 36LCM = 180
6. 7, 12LCM = 84
7. 5, 6 LCM = 30
8. 5, 6 ,7LCM = 210
9. in 21 days (LCM of 3 & 7)
10. 20, 36LCM = 180
11. 15, 27LCM = 135
12. 8, 14, 20 LCM = 280
13. 5, 12, 15 LCM = 60
14. 12x, 40y LCM = 120xy
15. 8x, 25y LCM =200xy
16. 2b
2
, 6c
3
LCM =6b
2
c
3
17
. 6a
3
, 8a LCM = 24a
3
22
.
23.
24.
25.

4. 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, 8a
3
b
2
, 10a
4
LCM =
280a
4
b
2
45
. 8x, 18xy LCM = 72xy
46. 9b
3
, 12bc
2
LCM= 36b
3
c
2

5. lowest common denominator
is the same as
least common multiple

13. 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

14. Denominator and the numerator.
3
Numerator
4
Denominator
3
4

15. 1
Write each fraction as a decimal.
2
/
5

16. 2Write each fraction as a decimal. Round to the nearest ten
thousandths if necessary.
-4
3
/
10

17. 4
9
1
10
5
11
11
20
4
5
5
8
0.8
0.45
0.1
0.55
0.625
0.4
Match fractions and decimals