Page 15 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - CITS

1

1 5
1
1 5 1 13 5, 7
5 1 15 44 , 12
1 3 1 7
, , 5 1 3 7
7
1 44 3 5 12 1 5 1 , 7 , 5
3
, 1 , 3 7 , 1 , 4 = 12
4
4
, 5
1 4 , 12 14 34 4 7 12 4
,
1 1 = 3 4 7 , 1 5
4
12
1 4 , , 5 4 4 4 1 12 = 3 2
5
1
1 4 1 4 = 12 5 1 Multiply 4 by ,
4
=
4
4
14
1
Multiply = 5 1 by 2 54 4 3 3
3
1
=
4
4 ,
2
1
4
4

2 Multiply
by
Examples 44 = 3 4 33 , 2 3 6 by= 2 1 3 ,
Multiply
by
4
3 Multiply =×
,

2
3
Multiply
3 2 6 4 4 by 3 3 , 4 12 23 2
1
2
by
3 Multiply
,
4
3
Multiply
• 3 4 × 2 3 = 1 6 22 4 3 by 3 = 1 × 3 2 , 2 4 = 6 3 6 3 = 1
1 3
12
3
= ,
× Divide
2
4 × 3 3 = 12 6 =4 2 1 = by 2
8
3 4 × 2 3 3 = 4 2= 3 1 = 2 6 12 = 12 4
3
6 ×
3
12
by
×
4
Divide 3 8 = 3 = , 3 2 3 33 12 3 by 2 3 , 1
12 3 Divide
3
4
4
3 4
Divide by , by × , =
4
8
Divide =÷

3
8 by 8 3
4
3 1
• 3 Divide 3 Divide 3 , 8 4 by 34 38 , 2
3
3
4
Divide =÷ 8 by 3=× 4 , 3 4 3 4 1
8
×
1 =
4 ÷ 2
3 8 ÷ 3 4 = 8 3 38 × 8 = 4 3 42 =
3
4 3 3
1
4 = and
1 ×d
=
8 3 4 ÷ 3 8 3 ÷ Ad 2 3 = 8 8 3 12 2
3
433
34 4
3 ×= 8
3 8 3 3 4 3÷ 2 4 = 1× =
2
3
8
×
8
8
3
Add ÷ 4 3 4 = and 3 3 4 3 3 2 = 3 and 2 2 17 5
8 2 Add
8
2 9
2 8
4
3 Add =+

• Add 4 and 3 2 and + 3 = = 1
4
34 123
and
9
3 2 Add 3 Add 2 and 23 12 12 12
5
17
8
+ Add = 4 and 3 3 4 2 = 9 1= 8 17 5
+
3
8 +
5 =
9 12
3 4 + 2 3 = 4 3 +4 12 = 3 17 = 12 7 = 1 12 17 12 = 1 12
+ 12
3 2
8
17
9
5
12
8 =
5
from
12
12
4 3 3 + 2 12 9 + 2 + 3 sub 12 17 + 8 1= 12 = 17 12 = 1 5 12
9= 12
3 = 4
16
32
3 4 2 3 7 9 + 8 = 12 17 + 12 = 5 12 = 1
17
12
1
=
12
sub
12 7
4 from
• 4 + 3 = 7 16 12 + 3 32 = 12 from 12 17 12
12
12 sub
17
7
16
sub 16 from 32 17 from 17 32

7 sub
7
sub 17 from 16 177 17from −= 17 32 (1714 = − 14) = 3
−
7 sub
16
32
sub 32 from 16 32 32 32 32 32
16
17 7 17 32 (17 − 14) 3
16 14
− = 17 − 7 = 17 14= (17 − 14) 3
14) =
17 Types of fractions 17717 32 14 − 32 16 (17 − − 32 = (17 − 32 = 3 32
17
32
7 16
= 32
32
3 32
14
14)
=
−
−
=
32
=
−
=
−
3
32
32
32 17 16 7 32 17 7− 16 14 (17 − 14) 32 14) = 332
17 = 32
17 = 32
(17 − = 32
14 32
−
• Proper fractions are less than unity. Improper fractions have their numerators greater than the denominators.
14)
17 7 16 17 − 32 14 = 32 (17 − =− 32 3 32 =
32
=
=
−
−
=
32
32
• A mixed number has a full number and a fraction.
32
32
16
32
32 16 32 32 32 32
2
CITS : WCS - Electrical - Exercise 1