Calculator skills

350 ÷ 1.5 + 2.50 must be manually split into two parts:
350 ÷ 1.5 = 233.33

Write the answer down, then click on [C] to clear the answer and
use the mouse to enter 233.33 + 2.50 as a final step:

   [.]   [+]  [.]  
=235.83

Multiplication table

1 | 1   2    3   4     5     6   7      8    9     10  11     12
--------------------------------------------------------------------------
1  | 1  2    3    4    5     6    7     8     9    10   11     12
2  | 2  4    6    8   10    12  14   16  18   20   22     24
3  | 3  6    9    12  15   18  21   24  27   30   33     36
4  | 4  8    12  16  20   24  28   32  36   40   44     48
5  | 5  10   15  20  25  30  35   40  45   50   55     60
6  | 6  12   18  24  30  36  42   48  54   60   66     72
7  | 7  14   21  28  35  42  49   56  63   70   77     84
8  | 8  16   24  32  40  48  56   64  72   80   88     96
9  | 9  18   27  36  45  54  63   72  81   90    99    108
10| 10 20  30  40  50  60  70   80  90   100  110  120
11| 11 22  33  44  55  66  77   88  99   110  121  132
12| 12 24  36  48  60  72  84   96  108  120 132  144

Divsion Technic:

210 ÷ 14 = 140 ÷ 14 + 70 ÷ 14
= 10 + 5
= 15
Method :
i) split 210 into 140 and 70 because it is much easier to divide
140 by 14 and 70 by 14 than it is to divide 210 by 14;
ii) divide 140 by 14 to give 10;
iii) divide 70 by 14 to give 5;
iv) add the two results: 10 + 5 = 15.

Decimals to fractions

Here is some exemple of decimals to fraction conversion.
0.25 = nought point two five = one-quarter
0.5 = nought point five = one-half
0.75 = nought point seven five = three-quarters
0.1 = nought point one = one-tenth
0.2 = nought point two = one-fifth
0.125 = nought point one two five = one-eighth
0.375 = nought point three seven five = three-eighths
0.01 = nought point nought one = one hundredth
0.001 = nought point nought nought one = one-thousandth
0.005 = nought point nought nought five = five-thousandths

Percentage Math:

A percent can be expressed as a decimal by dividing the
numerator by 100
70% = 70.0/100 = 0.7
Some equivalent decimal and their percent value :-
1/10 = 0.1 = 10%
1/4 = 0.25 = 25%
1/3 = 0.33 = 33.3%
1/2 = 0.5 = 50%
2/3 = 0.67 = 66.7%
3/4 = 0.75 = 75%
1/8 = 0.125 = 12.5%
3/8 = 0.375 = 37.5%

How to convert a fraction to a decimal or a percent ?

12/25 = (12 x 4) / (25 x 4) = 48/100 = 0.48 = 48%

Aspects of algebra :

The order in which to work out a sum containing more then
one arithmetic sign.

BIDMAS

The order of working out problems is:
B = Brackets;
I = Indices;
D = Division;
M = Multiplication;