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Basic Math
2015
Advanced Meter School
August 18-20, 2015
The Role Mathematics Play In
Metering
Register Ratio
Watt-hour Constants
Usage Between Reads; Billing
Technical Information:
Equations, Power Triangle, Phasor Diagrams
Addition
Subtraction
Multiplication
Division
Fractions
1
2
Numerator
Denominator
Fractions
3 1/3
13 8/9
Decimal Numbers with Whole
and Fractional Parts
3
4
Whole
2
.
Decimal
5
9
6 8
Fraction
Adding Decimal
Numbers
1
2
1
2
+
3
4
7
. 4
. 3
. 7
5
0
5
Adding Fractions
1
3
+
8
9
Adding Fractions
3
9
+
8
9
Adding Fractions
3
9
+
8
9
= 11
9
Adding Fractions
11
9
= 1 and 2
9
Subtracting Whole
Numbers
7
- 5
2
2
1
1
5
3
2 Difference
Subtracting with
Borrowing
2
15
5
15
3 6 5
- 1 8 9
1 7 6
Subtracting Two
Decimal Numbers
1
5 .
- 4 .
1 .
2
1
0
13
3
5
8
7
10
8
7
0
0
6
4
Subtracting Two
Fractions
2
3
_
1
3
=
1
3
Multiplication Symbols
4 X 4
4 * 4
(4) (4)
Multiplying Whole
Numbers
1 2 3
X 2
2 4 6
Product
Multiplying Decimal
Numbers
4 . 1
X
8 2
4 1 2
4. 9 4
.
2 3
1. 2
4 6
3
7 6
.
Multiplying Fractions
2
1
2
3 X 2 = 6
or 1
3
Division Symbols
.
4 . 8
___
8) 4
4
4/8
or
8
Parts of a Division
Problem
2
)
6
Divisor 3
.
Quotient
Dividend
Long Division
15 9
23 ) 3657
36 .
23 .. :
:
13 5:
115 .
20 7
207
.
Decimal Number
Division
.
.
.173 ) .30 0
Decimal Number
Division
.
.
173.) 30 0
Dividing Two Fractions
1
3
..
1
4
1
4
X
=
3
1
.
4
3
Ratio
A ratio is an expression which compares
quantities relative to each other.
Simplify
400 : 5
Divide each side 5
80 : 1
288 : 120
Divide each side 120
2.4 : 1
600 : 5
Divide each side 5
120 : 1
Average
An average of data refers to a
measure of the “middle”.
1159
1091
1475
1123
4848 / 4 = 1212
Questions / Answers