Eğitim - Öğretim ve Ödev Forumu

MATEMATİK
SAYI TOPLAMI
FORMÜL
1. ) 5 +6 + 7 +……..+10  = 45          

  A =  s  x  m  +  ( a )               s = (10 – 5 ) + 1
                                                n = s - 1                        
                                                m = 5
                                              
                                              n (n+1)
                                     a =   _______  = 15
  
                                                   2


2. ) 6 + 8 +..........+12 = 36

A = s x m + ( a )                        

1.      
         ( 12 – 6 )                                            
  s =   _______   + 1       (Kaç tane sayı toplandığı )
                                                                    
              2

2. s = n

3. m = 6 – 1               (Sayının başındaki rakamın bir eksiği )
                                
4.  a = n2


3) 7 + 9 + ..............15 = 55

A = S x m + ( a )                                      1.          ( 15 – 7 )
                                                                 s =  __________  +  1
                                                                            
                                                                               2  

                                                             2.    s = n

                                                             3.   m = 7 - 1

                                                             4.    a = n x ( n + 1 )

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