CLASS-4
FIND THE MISSING NUMBER

Find The Missing Digit

In this case, will apply the earlier rules of finding difference that is

 ‘Minuend’ - ‘Subtrahend’ = ‘Difference’

 

1)  IF, X8Y6Z - 3W321 =  231U2  

Then find the value of X, Y, Z, W, U

METHOD -


Step.1)  Consider ‘Ones’ 

‘Minuend’-‘Subtrahend’ =  ‘Difference’  ‘Minuend’ = ‘Subtrahend’ + ‘Difference’

‘Minuend’ =  1 + 2 = 3 


Step.2)  Consider ‘Tens’

‘Difference’= ‘Minuend’-‘Subtrahend’ 

 ‘Difference’ = 6 - 2 = 4.


Step.3) Consider ‘Hundreds’

         ‘Minuend’ - ‘Subtrahend’ = ‘Difference’  

         ‘Minuend’ = ‘Subtrahend’ + ‘Difference’

           ‘Minuend’ =  1 + 3 = 4


Step.4) Consider ‘Thousands’

         ‘Minuend’ - ‘Difference’ = ‘Subtrahend’

         ‘Subtrahend’ = 8  -  3   =  5



Step.5) Consider ‘Ten-Thousands’

         ‘Minuend’ - ‘Subtrahend’ = ‘Difference’ 

         ‘Minuend’ = ‘Subtrahend’ +  ‘Difference’

          ‘Minuend’ =  3  +  2  = 5

 

 

2)  47X65 - YZ3W1 = 2353U

Then find the value of X, Y, Z, W, U

METHOD -

Step.1)  Consider ‘Ones’ 

‘Minuend’-‘Subtrahend’ = ‘Difference’

‘Difference’= ‘Minuend’-‘Subtrahend’

‘Difference’ =  5 - 1 = 4   



Step.2)  Consider ‘Tens’

‘Difference’= ‘Minuend’-‘Subtrahend’                    ‘Subtrahend’=‘Minuend’-‘Difference’ ‘Subtrahend’

             =  6 - 3 =  3


Step.3) Consider ‘Hundreds’

        ‘Minuend’-‘Subtrahend’ = ‘Difference’ 

     ‘Minuend’ = ‘Subtrahend’ + ‘Difference’

     ‘Minuend’ = 3 + 5 =  8


 Step.4) Consider ‘Thousands’

          ‘Minuend’ - ‘Subtrahend’ =  ‘Difference’

          ‘Subtrahend’ = ‘Minuend’ - ‘Difference’

            ‘Subtrahend’ = 7 - 4 = 3


Step.5) Consider ‘Ten-Thousands’

         ‘Minuend’ - ‘Subtrahend’ = ‘Difference’ 

         ‘Subtrahend’ = ‘Minuend’ - ‘Difference’

         ‘Subtrahend’ = 4 - 2 =  2