Math Fractions Practice Worksheet
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1
2Tum each of these ordinary fractions into a decimal fraction
.
Use a
calculator.
.i
1)
5
2)
t
3)
t
4)
t
6)
;t
7)
k
8)
r.
5)
*
9)
.
-k
10)
"*
11)
~
12)
12
P)
Q)
R)
S)
T)
Use a calculator to determine the repeating decimal form for each of the following ordinary fractions. Use a BAR over the
part of the decimal that repeats or three dots (an ellipsis) at the end
.
DO NOT ROUNq OFF.
I
1)
"3
2)
t
3)
*
4)
%
6)
t
7)
t
8)
~
5)
*
10)
t}
II)
~
12)
~
9)
*
Round off each decimal to the precision indicated in the
parenthesis.
1)
15.72
(whole number)
2)
123.4
(whole number)
3)
170.159
(whole number)
4)
-10.54
(whole number)
5)
0.59
(whole number)
6)
0.42
(whole number)
7)
245
(whole number)
8)
-8
(whole number)
9)
734
(nearest ten)
10) 37
(nearest ten)
11) 121
(nearest ten)
12) 340
(nearest ten)
13)
12.451
(nearest tenth)
14) 3.749
(nearest tenth)
IS) 5.96
(nearest tenth)
16) 29.95201
(nearest tenth)
17) 0.039
(nearest tenth)
18) 0.033
(nearest tenth)
19) 1.0471
(nearest hundredth)
20) 1.0471
(nearest thousandth)
21) 5.9996
(nearest thousandth)
A "counF is always EXACT, and a "measuremenF is always APPROXIMATE, always rounded
off.
Sometimes it's hard to
tell the
difference.
Identify each of the following as a count, a measurement or indeterminate, if you can't tell.
1)
5 pounds of apples
2)
5 apples
3)
2 children
4)
65 mph
5)
17 tons
6)
2 half-sisters
7)
2.5 children
8)
the population of the U.S.
9)
half of a candy bar
10) the distance in miles from San Francisco to Ph iladelphia
To add or subtract counts and measurements you must have the same "unir, the same objects being counted or the
same kind of measurement being made. If you don't have the same unit, you must GET the same
unit,
the "common" unit,
before you can add or subtract... that's the principle behind the "common denominator".
:",
j
>.
c\~\
IV}e;l.
<'
j
f
1lAA
c~
'"
+
~ ltll...o.
11v-
w....,.I
1)
5 children + 3 children
2)
5 apples - 2 apples
3)
8.5 ft + 2.25 ft
4)
2 clubs + 4 hearts + 1 spade + 6 diamonds
5)
2 apples + 3 oranges
6)
5 boys + 3 girts
7)
1.5 ft
+
4 inches
8)
1 hr 15 min + 2 hr 30 min
9)
2 ft
+
3 apples
10) 5+3
Suppose you want to talk about a part of something, a piece of a bigger picture. Giving someone four apples is an isolated
fact. Giving someone four apples out of the five you have or giving someone four apples out of 500 apples puts the fact in
context,
gives you perspective, tells you more about what giving aways four apples MEANS. We can express this
contextual information as a RATIO
,
a fraction composed of two counts or two
measurements.
Write a ratio for each of the
situations below
...
1)
there are 27 females in a class of 42 students
2)
8 hours out of every day is spent sleeping
3)
3 marriages out of 5 in the U.S. end in divorce
4)
a class of 37 students has 21 females
5)
2 classes are
combined.
One class of 21 students has 8 males, and the other class of 18 students has 7 males.
Write the ratios that describe the males in each of the two individual
classes,
and then write the single ratio that
describes the males in the combined
class.
6)
a person walking quickly can cover 5 miles in 1 hour
7)
Safeway has their house-brand of canned vegetables on sale: 12 cans for
$6
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