Math Flashcards
1
Q
roman numeral (RM) L=
A
50
2
Q
(RM) C=
A
100
3
Q
(RM) D=
A
500
4
Q
(RM) M=
A
1000
5
Q
(+)+(-)=
A
sign of the larger number
6
Q
(-)+(-)=
A
NEGATIVE #
7
Q
(-)x(-)=
A
POSITIVE #
8
Q
(-)x(+)=
A
NEGATIVE #
9
Q
(-) divided by (-)=
A
POSITIVE #
10
Q
(-) divided by (+)=
A
NEGATIVE #
11
Q
-10x47=
A
-470
12
Q
-65+-32
A
-97
13
Q
-7x4=
A
-28
14
Q
what is the greatest common factor (GCF)?
A
a set of numbers is the largest number that can evenly divide into all of the numbers in the set
15
Q
what is the GCF of 24 and 18?
A
factors of 24:1 ,2,3,4,6,8,12,24
factors of 18: 1,2,3,6,9,18
The GCF is 6
16
Q
what is the GCF of 20 and 16?
A
the GCF is 4
17
Q
1yd=
A
3ft
18
Q
1gal=
A
16cups
19
Q
12in=
A
1ft
20
Q
1meter =
A
1000mm
21
Q
1kg=
A
1000g
22
Q
1L=
A
1000ml
23
Q
1cm=
A
10mm
24
Q
dividing a decimal by a decimal
5.76 divided by 0.3=
A
19.2
25
dividing a decimal by a decimal
| 86.4 divided by 0.12=
720
26
dividing a decimal by a decimal
| 23.6 divided by 0.04=
590
27
dividing a decimal by a whole number
| 4.85 divided by 5=
0.97
28
dividing a decimal by a whole number
| 95.1 divided by 6=
15.85
29
simplify the fraction 121/77
they both share a common factor of 11. so id we didide each number by 11 you can simplify the fraction.
11/7
30
simplify the fraction 3/12
1/4
31
simplify the fraction 14/49
2/7
32
improper fractions into mixed numbers
| 17/3
5 2/3
33
improper fractions into mixed numbers
| 36/6
6
34
improper fractions into mixed numbers
| 51/9
5 6/9
35
multiplying fractions
| 6 x 1/3
2
36
multiplying fractions
| 12x 3/5
7 1/5
37
multiplying fractions
| 3/4 x 2/3
1/2
38
multiplying fractions
| 1/7 x 2/3
2/21
39
whats an important thing to remember when your dividing fractions?
KEEP, SWITCH, FLIP
| keep the first fractions, switch the dividing to multiply, then flip the second fractions
40
```
dividing fractions (keep,switch, flip)
1/2 divided by 2/5
```
1 1/4
41
dividing fractions
| 2/8 divided by 1/4
1
42
dividing fraction by mixed number
| 1/4 divided by 2 2/5
5/48
43
dividing fraction by mixed number
| 5/8 divided by 6 2/3
3/32
44
dividing fraction by mixed number
| 2/5 divided by 1 1/5
1/3
45
multiplying mixed numbers by fractions
| 3 1/4 x 2/5
1 3/10
46
multiplying mixed numbers by fractions
| 5 2/3 x 3/7
2 3/7
47
multiplying mixed numbers by fractions
| 1/4 x 8 1/2
17/8
48
adding fractions
| 3/8 + 2/12
13/24
49
adding fractions
| 2/3 + 1/6
5/6
50
adding fractions
| 1/6 + 5/9
13/18
51
subtracting fractions
| 10/12 - 5/8
5/24
52
subtracting fractions
| 2/3 - 1/5
7/15
53
subtracting fractions
| 2 1/3 - 3/2
5/6
54
converting fractions into decimals
| 9/25
.36
55
converting fractions into decimals
| 3/16
.1875
56
converting decimals into fractions
| .45
9/20
57
what is the equation used for proportions?
a/b= c/d
58
what do you do with proportions?
cross multiply
59
percentages
| part/whole =
percent
60
percentages
| whole x percent =
part
61
percentages
| part/percent=
whole
62
percent change
| amount of change/original amount=
percent change
63
percent change
| original amount x percent change =
amount of change
64
percent change
| amount of change/ percent change =
original amount
65
probabilities
| desired outcomes/ total possible outcomes =
probability
66
probabilities
| probability x total possible outcomes =
desired outcomes
67
probabilities
| desired outcomes/ probability =
total possible outcomes
68
what are the KEY words for ADDITION?
added, combined, increased by, in all, total, perimeter, sum, & more than
69
what are the KEY words for SUBTRACTION?
how much more, less than, fewer than, fewer than, exceeds, difference, & decreased
70
what are the KEY words for MUTIPLICATION?
of, times, area, & product
71
what are the KEY words for DIVISION?
distribute, share, average, per, out of, percent, & quotient
72
what are the KEY words for EQUALS?
is, was, are, amounts to, & were
73
distant word porblems
| d=
rt
74
work problems
| rate x time =
work
75
how do you find the MEAN?
total all the terms together then divide by the number of terms
76
find the mean of 24, 27, and 18
69 divided by 3 = 45
77
what is the MEDIAN?
the middle number in a given set
78
how do you find the MEDIAN?
put the number in numerical order & the middle number will bee the median
79
what is the median of 24, 27, 18?
18, 24, 27
| its 24
80
what do you do if their are two MEDIANS?
you add them together then you divide by 2
81
what is the median of 24, 27, 18, 19?
18, 19, 24, 27
| 19+24 divided by 2 will be 21.5
82
what is the MODE?
the number which occurs most frequently within a given set
83
what is the mode of 2, 5 , 4, 4, 3, 2, 8, 9, 2, 7, 2, 2
2
84
what is the AREA formula for CIRCLE?
A = π r2
85
what is the PERIMETER formula for CIRCLE?
C=2 πr = πd
86
what is the AREA formula for TRIANGLE?
A=b x h divided by 2
87
what is the PERIMETER formula for TRIANGLE?
p= s1 + s2 + s3
88
what is the AREA formula for SQUARE?
A=s2
89
what is the PERIMETER formula for SQUARE?
p=4s
90
what is the AREA formula for RECTANGLE?
A= l x w
91
what is the PERIMETER formula for RECTANGLE?
p=2l + 2w
92
what is the pythagorean theorem formula?
a2 + b2=c2
