Quick Math Flashcards
1^2
1
√4
2
0^2
0
3^4
81
2^9
512
17^2
289
2^3
8
2^4
16
2^5
32
2^6
64
2^8
256
22^2
484
6^3
216
18^2
324
21^2
441
15^2
225
16^2
256
25^2
625
2.25^2
5
1.7^2
3
1.4^2
2
2^10
1024
9^3
729
8^3
512
7^3
343
14^2
196
2^7
128
2^-1
0.5
19^2
361
1/2^2
1/4 = 0.25
2^-3
1/2^3=1/8=0.125
10^3
1000
5^3
125
4^5
2^10=1024
4^4
256
20^2
400
30^2
900
1/10
0.1=10%
1/25
.04=4%
4/3
1.333…=133%
3/3
1=100%
2/3
.6666…=66.66%
1/6
0.167=16.67%=16 2/3%
1/9
0.1111=11.1%
1/3
0.333…=33.33%
3/10
0.3=30%
2/10=1/5
0.2=20%
1/50
0.02=2%
2/8=1/4
0.25=25%
1/8
0.125=12.5%
12/10=6/5
1.2=120%
11/10
1.1=110%
3/8
0.375=37.5%
4/10=2/5
0.4=40%
6/10=3/5
0.6=60%
5/10=1/2
0.5=50%
7/10
0.7=70%
5/8
.625=62.5%
4/8=1/2
0.5=50%
8/10=4/5
0.8=80%
9/10
0.9=90%
10/10=5/5=1
1.0=100%
6/8=3/4
0.75=75%
7/8
0.875=87.5%
8/8=4/4=1
1.0=100%
10/8=5/4
1.25=125%
12/8=6/4=3/2
1.5=150%
1/20
0.05=5%
1/100
0.01=1%
5/6
0.833=83.3%
New percent formula
New Percent (as % of original)
= New Value/Original value
(x+y)^2
X^2 + 2xy + y^2
(x-y)^2
X^2 - 2xy + y^2
(x+y) (x-y)
X^2 – y^2
For any x,
Sq rt x^2 = I x I
If x = x^2
If x = x^2, then x=0 or 1
% increase of 50%
= New percent of 150%
= Multiply original value by 1.5 or 3/2
% decrease of 10%
= New percent of 90%
= multiply original value by 0.9
% increase of 100%
=New percent of 200%
= multiply original value by 2
% decrease of 20%
= New percent of 80%
= multiply original value by 0.8 or 4/5
% decrease of 75%
= New percent of 25%
= multiply original value by 0.75 or ¼
% increase of 20%
=New percent of 120%
= multiply original value by 1.2 or 6/5
% increase of 25%
=New percent of 125%
= multiply original value by 1.25 or 5/4
% decrease of 25%
= New percent of 75%
= multiply original value by 0.75 or ¾
Pythagorean Triples
3-4-5 Triangle (and its multiples)
5-12-13 Triangle