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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