Rabu, 06 Februari 2013

Fakta fakta dasar penjumlahan



Penjumlahan

Fakta fakta dasar penumlahan
  1. Hasilnya membentuk urutan berpola
1 + 1 = 2                                             1 + 3 = 4
2 + 1 = 3                                             2 + 3 = 5
3 + 1 = 4                                             3 + 3 = 6
  1. sukunya merupakan bilangan yang sama
1 + 1 = 2                                             4 + 4 = 8
2 + 2 = 4                                             5 + 5 = 10
3 + 3 = 6                                             6 + 6 = 12
  1. Salah satu sukunya bilangan nol
0 + 0 = 0                                             3 + 0 = 3
1 + 0 = 4                                             4 + 0 = 4
2 + 0 = 6                                             5 + 0 = 5
  1. Kedua sukunya bilangan ganjil atau genap
1 + 1 = 2                                             2 + 2 = 4
1 + 3 = 4                                             4 + 4 = 8
3 + 5 = 8                                             6 + 6 = 12
  1. Salah satu dan jumlahnya diketahui atau hanya jumlahnya diketahui
2 + ...  = 7                                           ...  + ... = 5
... + 5  = 7                                          
  1. Hasil penjumlahannya membentuk urutan bilangan berpola membilang loncat
1 + 2  =  3 ;     3 + 2 =   5;    5 + 2 = 7 ;    7 + 2 = 9












 


                      3                 5              7                 9
  1. Pertukaran tempat









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