Challenge Sheet!! Converting Repeating Decimals into Fractions
[Pages:2]Challenge Sheet!! Converting Repeating Decimals into Fractions
Directions: Convert decimals into fractions and fractions into exact (repeating) decimals.
1.
7 9
2.
37 99
20. 0.8?3
(Hint: 0.8?3 = 0.8 + 0.0?3 )
3.
13 999
4.
2503 9999
5.
7 90
21. 0.80?5
6.
37 990
7.
37 9900
8.
19 9990000
22. 0.31?6
9. 0.47
10. 0.?47? 11. 0.04?7?
23. 0.147?72?
12. 0.0?4?7?
13. 0.0000?0?4?7
14. 0.?1
24. 0.0284?6?5?3
15. 0.?65?
16. 0.6?5?1
17. 0.0?0?7?
18. 0.00?7
19. 0.000?1?7?
Answers
1. 0.?7
2. 0.?3?7
3. 0.0?1?3
4. 0.2?5?0?3
5. 0.0?7
6. 0.0?3?7
7. 0.00?3?7
8. 0.00000?1?9
9.
47 100
10.
47 99
11.
47 990
12.
47 999
13.
47 9999000
14. 1/9
15.
65 99
16.
217 333
17.
7 999
18.
7 900
19.
17 99900
20. 5/6
21.
29 36
22. 0.31?6
Solution:
Separating
the
two
parts,
we
know
that
0.31
is
31 100
and
that
0.00?6
is
6 900
as
a
fraction.
0.31?6 can
therefore
be
written
as
31 100
+
9060.
Getting common denominators and adding these two fractions
gives
us
285 900
which
reduces
to
a
final
answer
of
1690.
23. 0.147?7?2
Solution:
Separating
the
two
parts,
we
know
that
0.147
is
147 1000
and
that
0.000?7?2
is
72 99000
as
a
fraction
(don't
reduce it!).
Getting common denominators and adding these two fractions gives us
14625 99000
which
reduces to a final answer of 1838.
24. 0.0284?6?5?3
Solution:
Separating
the
two
parts,
we
know
that
0.028
is
28 1000
and
that
0.0004?6?5?3
is
4653 9999000
as
a
fraction.
Adding
these
two
fractions
gives
us
284625 9999000
which
reduces
(by
dividing
top
and
bottom
by
25,
then
5, then 9, and then 11) to a final answer of 82038.
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