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Thursday, May 24, 2012

Math Computation Part 1

Samuel F. Campbell May 23, 2012
Page 1
Math Computation

EXAMPLE # 1
_26_
7) 128
26
7) 128

Example # 2
1.20
+0.85
1.05

Example # 3
270 x 200 =

270 27
x20 or x 2
54,00 54 and replace the two zeros. plus one for tens place.

Example # 4
672 / 6

_112_
6) 672

Example # 5
212
x8
1,696

Example # 6
600 x 245 =

245
x 6XX
147,0XX





Samuel F. Campbell May 23, 2012
Page 2
Math Computation


Example # 7
40 x 24 =

40 24
x 24 OR x 4X

96X = 960


Example # 8
____
12)384

32
12)384
36
24
24

Example # 9

4500 / 3 =

15
3)45xx
30
15
15

Example # 10
3 3/9 - 2 1/9 = 1 2/9
(3 - 2) (3/9 -1/9) = 1 2/9





Samuel F. Campbell May 23, 2012
Page 3
Math Computation

Example # 11
2.88 / 16 =
0.1 8
16) 2.8 8
1 6
1 2 8
1 2 8

Example # 12
54 - 0.024

54.000
0.024
53.976

Example # 13
$3.23
- $2.80
$0.43

Example # 14
3/8
- 2/8
1/8

Example # 15
2/9 / 2 =

2/9 /2/1 =
2/9 x 1/2 = 2/18 =1/9

Example # 16
20% of 40 = ?
20 x 40 = ?
100
2x x 4x = 8
1xx


Samuel F. Campbell May 23, 2012
Page 2
Math Computation
Example # 17
34.2 x 4 =
34.2
x 4.0
136.8x

136.80

Example # 18
3 - -1 =
3
-1
2

Example # 19
62% of ____ = 62

100 62 x ___ = 62 x 100
62 100 62
___ = 100

Example # 20
-54 / -2 =
27
-2) -54
4
14
14
= 27
Example # 21
What % of 100 is 33

? % x 100 = 33
?% x 100 x 100 = 33 x 100
100 100 100 100

?% = 33
100
= 33

Samuel F. Campbell May 23, 2012
Page 2
Math Computation
Example # 22
12+ -1 + -1 =
12
-1
+ -1
10

Example # 23
1/2 / 4/5 =

1/2 x 5/4 = 5/8

Example # 24
15% of ___ = 30


15% x ___ = 30
100 100

15
100

2 x 100 = ___ = 200
15) 30

Example # 25
-2 - 15 =
-2
- -5
-7

1 comment:

  1. Samuel F. Campbell May 23, 2012
    Page 1

    Math Computation

    EXAMPLE # 1
    _26_
    7) 128
    26
    7) 128

    Example # 2
    1.20
    +0.85
    1.05

    Example # 3
    270 x 200 =

    270 27
    x20 or x 2
    54,00 54 and replace the two zeros. plus one for tens place.

    Example # 4
    672 / 6

    _112_
    6) 672

    Example # 5
    212
    x8
    1,696

    Example # 6
    600 x 245 =

    245
    x 6XX
    147,0XX





    Samuel F. Campbell May 23, 2012
    Page 2

    Math Computation


    Example # 7
    40 x 24 =

    40 24
    x 24 OR x 4X

    96X = 960


    Example # 8
    ____
    12)384

    32
    12)384
    36
    24
    24

    Example # 9

    4500 / 3 =

    15
    3)45xx
    30
    15
    15

    Example # 10
    3 3/9 - 2 1/9 = 1 2/9
    (3 - 2) (3/9 -1/9) = 1 2/9





    Samuel F. Campbell May 23, 2012
    Page 3

    Math Computation

    Example # 11
    2.88 / 16 =
    0.1 8
    16) 2.8 8
    1 6
    1 2 8
    1 2 8

    Example # 12
    54 - 0.024

    54.000
    0.024
    53.976

    Example # 13
    $3.23
    - $2.80
    $0.43

    Example # 14
    3/8
    - 2/8
    1/8

    Example # 15
    2/9 / 2 =

    2/9 /2/1 =
    2/9 x 1/2 = 2/18 =1/9

    Example # 16
    20% of 40 = ?
    20 x 40 = ?
    100
    2x x 4x = 8
    1xx


    Samuel F. Campbell May 23, 2012
    Page 2

    Math Computation
    Example # 17
    34.2 x 4 =
    34.2
    x 4.0
    136.8x

    136.80

    Example # 18
    3 - -1 =
    3
    -1
    2

    Example # 19
    62% of ____ = 62

    100 62 x ___ = 62 x 100
    62 100 62
    ___ = 100

    Example # 20
    -54 / -2 =
    27
    -2) -54
    4
    14
    14
    = 27
    Example # 21
    What % of 100 is 33

    ? % x 100 = 33
    ?% x 100 x 100 = 33 x 100
    100 100 100 100

    ?% = 33
    100
    = 33

    Samuel F. Campbell May 23, 2012
    Page 2

    Math Computation
    Example # 22
    12+ -1 + -1 =
    12
    -1
    + -1
    10

    Example # 23
    1/2 / 4/5 =

    1/2 x 5/4 = 5/8

    Example # 24
    15% of ___ = 30


    15% x ___ = 30
    100 100

    15
    100

    2 x 100 = ___ = 200
    15) 30

    Example # 25
    -2 - 15 =
    -2
    - -5
    -7

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