Chapter 5 2 Decimals to Fractions
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Transcript of Chapter 5 2 Decimals to Fractions
Do Now - 11/17Find the LCM of the following expressions.
3x2y and 12xy
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
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.
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
lowest common denominator
is the same as
least common multiple
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
Denominator and the numerator.
3Numerator
4Denominator
34
1 Write each fraction as a decimal.
2/
5
2 Write each fraction as a decimal. Round to the nearest ten thousandths if necessary.
- 43/
1 0
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