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                                               slide down  to define difficulty of question.                                            
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                Click "Arrow" to change to  opposite direction                                                                                 
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There are 2 methods to enter answer.  
Method 1) Key the answer into yellow field directly via real keyboard.  
Method 2) Click the button of virtual keyboard on screen. 
  
| Method 1)  | Each digit is always entered from left to right. You can enter  '.' (decimal number) and '-' (negative number) Do not enter , (comma) in the answer.  |  
         | Method 2)  | You can control the direction of each digit. It may be entered "from left to right" or "from right to left".  |  
 
 
Each digit is entered from right to left 
This direction is suitable for the beginners or someone that lack of maths skill. While they are computing each digit, they can input the result of each digit immediately from
right to left -- according to the direction of their computing each digit from right to left.  
...  thousand โ hundred โ ten โunit   
So they don't have to remember all digits of the final answer after the complete calculation.  
 Notice Use this direction at the beginning only. After that try to improve your skill to enter the answer from "left to right".
Entering the answer from left to right needs more skills if you can do that means your maths skills are improved.
  
 
Each digit is entered from left to right 
This direction is suitable for someone that have basic maths skill and want to improve their skills to the higher level.
They have to calculate all digits in mind then input the final result from left to right. 
  
The arrow shows the direction.  
The arrow points to left means that each digit of answer is entered from right to left 
The arrow points to right means that each digit of answer is entered from left to right 
Click at the arrow to change it to the opposite direction. 
  
Click  Delete button to delete the last digit entered. The direction of deletion  according to the direction of entering
  
Enter button performs the same function as Confirm button 
  
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Sound Effect 
Some browsers do not support sound effect. So the default of sound effect is 'No sound effect' so that every browser can play this game.
If you would like to play this game with sound effect, click mouse in the square in front of 'Sound Effect'. When check mark appears in the square
it means to allow sound effect in the game. If you do not hear sound effect when your answer is right or wrong and cannot go to next question,
it means your browser does not support sound effect. Click mouse in the square in front of 'Sound Effect' again to disappear check mark and play game
without sound effect.   Thank  www.freesfx.co.uk  for sound effect.
  
Define the difficulty of maths questions. 
   
Balloon game generates maths questions according to the properties in blue field below. So you can control the difficulty of questions.  
Enter the range of the first operand and the second operand  and tick for additional properties then slide up to click 'Restart' to play Doll collection game .
  
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	Big Family Trees 
	  
	If you build your family tree and connect it to your relatives' family trees like fitting pieces of jigsaw together, 
	you will get a perfect big family tree which you and your relatives can share to get to know one another although they live in different cities or different countries
	because the family tree explains clearly who is who.   
	...Click here for more details... 
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Define the following details for balloons game configuration.  
     | 1.  | Range of operands      
                                                                             The default range is 0 - 9.  The opeand is one digit number. It is the simplest question. The first operand  and the second operand may be in different range. 
				  | For example :  | The first operand is in range 11 - 99  |  
                      			               |                            | The second operand is in range 1-9    |  
                                                                             
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                  | 2.  | Negative number    
 	                                                         The default  does not  allow negative number. If you allow negative number,  tick  in check box of negative.
                                                                             Not tick  in check box of negative means negative number is not allowed. 
  
                                                                             If negative number is allowed, sign + or - is randomed first then number in range is randomed later. So you have a chance to get both
                                                                             positive and negative numbers.     
                                                                             If negative number is  not allowed,  only number in range is randomed. So you  never get  negative numbers.     
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                  | 3.  | Decimal places of operand    
                                                         The default  does not  allow  decimal places.   Not tick in check box of decimal places means not allow decimal places. 
  
                                                          To tick in check box of 1 decimal place  means  1 digit is randomed for 1 decimal place. If  zero is randomed, it becomes an integer such as 15.0 = 15    
  
                                                          To tick in check box of 2 decimal places  means  2 digits are randomed for 2 decimal places. If  the second decimal place is zero, it becomes 1 decimal place such as  38.20 = 38.2 
                                                           If the first and second decimal place are zero, it becomes an integer such  17.00 = 17       
  
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                  | 4.  | Decimal places of answer    
                                                        To tick in check box of 1 decimal place means that if  product has  2 or more than 2 decimal places , it will be rounded to 1 decimal place. 
  
                                                        To tick in check box of 2 decimal place means that if  product has  3 or more than 3 decimal places, it will be rounded to 2 decimal places. 
  
                                                        Not tick in check box of decimal place means that the number of decimal places of product is the sum of decimal places of  the first operand and the second operand.
                                                        It will never be rounded.
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Example 1  
  
The first operand and second operand  are one digit numbers which are in range 2 - 9.   
Both of them are allowed to be negative.     
Examples of questions created from this configuration.  
7  x  5  
-3  x  8  
4  x  -6  
-2  x  -9  
 
Example 2 
  
The first operand is two digit numbers which is in range 12 - 99.  
The  second operand  is range 2 - 9. It may have 1 decimal place or may be an integer.  
Negative numbers are not allowed   
Examples of questions created from this configuration.  
15  x 8.9  
34   x  6  
  
Example 3 
  
The first operand and second operand  are  in range 2 - 9.   
Negative numbers are allowed.    
The first operand and second operand may have 2 decimal places or 1 decimal place or may be integers. 
The product (answer)  is rounded to 1 decimal place.  
Examples of questions created from this configuration.  
2.15 x 3.48  
-4.77 x 9  
3.6 x -2.51  
-1.4 x -7.2  
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  |  |        Maths Games+, -, x, ÷ are basic maths operators. Complex formulas are composed of these basic operations. Metal calculations of these operations are essential maths skills.
  Maths games are created to be tools for children to improve their  metal calculation  skills. Users can customize the configuration of games to control  the level of difficulty. 
    ... Click here for more details ...  |    
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