Arithmetic Flashcards
(107 cards)
1
Q
Integer
A
Any whole number (not a fraction or decimal) e.g. 1,2,3,-1,-2,-3
2
Q
Even integer
A
Integer when divided by 2 gives you another integer
3
Q
Odd integer
A
Integer when divided by 2 gives you a noninteger
4
Q
Real number
A
Any number on the number line (e.g. 1, 2, pi, etc)
5
Q
Divisor or factor
A
Divisor is a positive integer that can divide into n without creating a remainder
6
Q
Multiple
A
Multiple of integer N results from multiplying n with another integer
7
Q
Prime number
A
Integer only divisible by itself and one (0 and 1 are not prime numbers)
8
Q
DIVISION properties (7/3 = 2r1)
A
7, dividend; 3, divisor; 2, quotient; 1, remainder
9
Q
1^2
A
1
10
Q
2^2
A
4
11
Q
3^2
A
9
12
Q
4^2
A
16
13
Q
5^2
A
25
14
Q
6^2
A
36
15
Q
7^2
A
49
16
Q
8^2
A
64
17
Q
9^2
A
81
18
Q
10^2
A
100
19
Q
11^2
A
121
20
Q
12^2
A
144
21
Q
13^2
A
169
22
Q
14^2
A
196
23
Q
15^2
A
225
24
Q
20^2
A
400
25
25^2
625
26
2^3
8
27
2^4
17
28
2^5
32
29
2^6
64
30
2^7
128
31
2^8
256
32
2^9
512
33
2^10
1024
34
3^3
27
35
3^4
81
36
4^3
64
37
4^4
256
38
5^3
125
39
5^4
625
40
6^3
216
41
Adding/subtracting fractions
Find common denominator
42
Multiplying fractions
Multiply all
43
Dividing fractions
Flip fraction
44
1/2
.5
45
1/3
.333
46
2/3
.666
47
1/4
.25
48
3/4
.75
49
1/5
.2
50
2/5
.4
51
3/5
.6
52
4/5
.8
53
1/6
.167
54
5/6
.833
55
1/7
.143
56
1/8
.125
57
3/8
.375
58
5/8
.625
59
7/8
.875
60
1/9
.111
61
2/9
.222
62
4/9
.444
63
5/9
.555
64
7/9
.777
65
8/9
.888
66
1/10
.1
67
3/10
.3
68
7/10
.7
69
9/10
.9
70
1/11
.0909
71
2 (divisibility rule)
Number is even
72
3 (divisibility rule)
The sum of digits is divisible by 3
73
4 (divisibility rule)
The last 2 digits = a Number divisible by 4
74
5 (divisibility rule)
The last digit of the number is either a 0 or 5
75
7 (divisibility rule)
Rest of digits - 2(last digit) = divisible by 7
76
9 (divisibility rule)
Sum of digits divisible by 9
77
10 (divisibility rule)
Last digit is 0
78
11 (divisibility rule)
Difference between sums of alternate digits = divisible by 11 (4,862, 10 - 10 = 0)
79
25 (divisibility rule)
Last 2 digits of number are divisible by 25
80
Powers end in 0
Will end in 0
81
Powers end in 1
will end in 1
82
Powers end in 5
Will end in 5
83
Powers end in 6
Will end in 6
84
Adding decimals
Line up decimal points
85
Multiplying decimals
Add all decimal places and integrate in final number
86
Dividing decimals
Move decimals to most right point and divide
87
Prime #
2,3,5,7,11,13,17,19,23,29,31,37,41,47
88
Factor
Positive integer that can be evenly divided into another integer
89
Factor tree
Break down tree into factor pairs closest to sq rt
90
Greatest common factor
Is the product of all prime factors the #s have in common
91
Least common multiple (e.g. LCM of 42 and 56)
Prime factorization (168)
92
Sum and difference of two even integers
Even
93
Sum and difference of two off integers
Even
94
Sum and difference of an odd and an even
Odd
95
Product of two even integers
Even
96
Product o two odd integers
Odd
97
Product of an odd and even integer
Even
98
(-)(+)
(-)
99
(-)(-)
(+)
100
(+)(+)
(+)
101
(-)/(+) or (+)/(-)
(-)
102
(-)/(-)
(+)
103
(+)/(+)
(+)
104
% change
(New value - old value)/(old value)
105
% increase of x
(1 + percent increase/100)x
106
% decrease of x
(1 - percent decrease/100)x
107
Ratio
Proportional relationship comparing two or more numbers
