Formulas Flashcards
(74 cards)
1
Q
A+A =
A
2a
2
Q
A x A=
A
A²
3
Q
A-A=
A
0
4
Q
A x B
A
AB
5
Q
+ + =
A
+
6
Q
- =
A
-
7
Q
+ - =
A
-
8
Q
- =
A
+
9
Q
B(BIDMAS)
A
Brackets
10
Q
I(BIDMAS)
A
Indices
11
Q
D(BIDMAS)
A
Division
12
Q
M(BIDMAS)
A
Multiplication
13
Q
A(BIDMAS)
A
Addition
14
Q
S(BIDMAS)
A
Subtraction
15
Q
X³ x X² =
A
X5
16
Q
²¼ -
A
5¼
17
Q
½ of 50
A
½ of 50
½ x 50
1/2 x 50/1
50/2
25
18
Q
½ + ¼
A
½ + ¼
½ = 2/4
2/4+ ¼ = ¾
19
Q
½ - ¼
A
½ - ¼
½ = 2/4
2/4 - ¼ = ¼
20
Q
2¼ + 2½ =
A
2¼ + 2½
9/4 + 5/2
5/2 = 10/4
9/4 + 10/4 = 19/4
21
Q
½ x ¼ =
A
1/8
22
Q
½ / ¼
A
½ / ¼
KCF
½ x 4/1
4/2 = 2/1
2/1 = 2
23
Q
20/11 x 33/5
A
20/11 x 33/5
4/1 x 3/1
12
24
Q
True or False : 7 is prime
A
True
25
Tell me the factors of 30
1,2,3,5,6,10,15,30
26
Prime factories 30
30
5 6
3 2
30 = 5 x 3 x 2
27
Work out the LCM of 30 and 12
30 prime factors = 5,3,2
12 prime factors = 2,3,2
2 x 3 x 5 =30
28
Work out the HCF of 30 and 12
30 prime factors = 5,3,2
12 prime factors = 2,3,2
3 x 2 =6
29
1/2 into a percentage
1/2
Bus stop method for 2 1
0.5 - 50%
30
72% into a fraction
72% -72/100
72/100 - 36/50
36/50 - 18/25
31
Decimal to fraction for 0.42
0.42 - 42/100
42/100 - 21/50
32
Fraction to Decimal 45/50
45/50
Do the bus stop method
0.9
33
34
Decimal to percentages 0.5
0.5 x 100 =50
50 = 50 %
35
Percentages to decimals 37%
37% / 100 =0.37
36
3.6 + 9.7 =
13.3
37
3.6 x 9.7 =
So times both the numbers by 10 so it equals
36 x 97 =3,492
3492/100 =34.92
38
0.97/0.37
97/100 / 37/100
K. C. F
97/100 x 100/37 = 9700 / 3700
Convert it back to a decimal
3700/ 9700 =0.381
39
Mode
Order the numbers
Then find the one that appears the most
40
Mode of 1,7,6,7,3,9
1,3,6,7,7,9
Mode =7
41
Median
Order the numbers then find the middle number
42
2,4,2,9,6,10 find the median
2,2,4,6,9
Median = 4
43
Mean
Total divided by the numbers of numbers
44
3,8,0,7,9
3 + 8 + 0 + 7 + 9 =27
27/5 =5.4
Mean = 5.4
45
Range
The difference between the largest number and smallest number
46
2,5,8,2,4,3
2,2,3,4,,5,8
8 - 2 =6
47
Transitions Up
+ and is the top number
48
Transitions Down
- and Top number
49
Transitions Left
- and Bottom number
50
Transitions right
+ and bottom number
51
Solving equations x- 2 = 27
X - 2 = 27
-2 -2
X = 25
52
Solving equations division
X/2 = 8
x2. x2
X = 16
53
Solving equations with brackets
5(4a + 2) = 70
5(4a + 2) = 70
20a + 10 = 70
-10. -10
20a = 60
/20. /20
a = 3
54
Right angle
90 degrees
55
Angles in a straight line sum up to
180 degrees
56
Angles about a point sum up to to
369 degrees
57
Vertically opposite angles are
Equal
58
Alternate angles are shaped as
Z
59
Co interior is shaped as a
C and sum up to 180
60
Corresponding is
On the same line
61
Total interior angles
N - 2 x 180
N = number of sides
62
One angle
N-2 x 180 = x
x / n
63
Exterior angles
360 / n
N = number of sides
64
One line in a triangles means it’s
Scalene
65
Two line in a triangles means it’s
Isosceles
66
Three line in a triangles means it’s
Equilateral
67
Area of rectangle
Base x height
68
Area of triangle
Base x perpendicular height/2
69
70
Area of a kite
Diagonal 1 x Diagonal 2 /2
71
Area of parallelogram
Base x height
72
Area of Trapezium
Top + Bottom x height / 2
73
Simplify 4:8
4:8
2:4
1:2
74
Ratio - sharing
Share $20 in the ratio 2:3
2:3
2+3=5
20/5 =4
4x2:4x3
8:12
