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Agora façam estes cálculos com dois materiais no quadro valor- lugar o material
     dourado e com os palitos de sorvete explicando o procedimento através de desenhos.

     123+85=

Centena                        Dezena                             Unidade




     Troca-se 10 dezenas por 1 centena




     Então 123+85=208
205-13=

Centena                       Dezena                                  Unidade




Troca –se uma centena por 10 dezenas para que se posa subtrair as dezenas.




Então 205-13=192
247+82=

Centena                       Dezena   Unidade




Troca-se 10 dezenas por 1 centena




Então 247+82=329
305-102=

Centena                       Dezena   Unidade
                                          v




          Então 305+102=407
428+136=

Centena                                    Dezena   Unidade
                                                       v




          troca-se 10 unidades por uma dezena




          Então 428+136= 564
108-27=

Centena                      Dezena                                         Unidade
                                                                                v




          Troca –se uma centena por 10 dezenas para que se posa subtrair as dezenas.




          Então 108-27=81

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Agora façam estes cálculos com dois materiais no quadro valor

  • 1. Agora façam estes cálculos com dois materiais no quadro valor- lugar o material dourado e com os palitos de sorvete explicando o procedimento através de desenhos. 123+85= Centena Dezena Unidade Troca-se 10 dezenas por 1 centena Então 123+85=208
  • 2. 205-13= Centena Dezena Unidade Troca –se uma centena por 10 dezenas para que se posa subtrair as dezenas. Então 205-13=192
  • 3. 247+82= Centena Dezena Unidade Troca-se 10 dezenas por 1 centena Então 247+82=329
  • 4. 305-102= Centena Dezena Unidade v Então 305+102=407
  • 5. 428+136= Centena Dezena Unidade v troca-se 10 unidades por uma dezena Então 428+136= 564
  • 6. 108-27= Centena Dezena Unidade v Troca –se uma centena por 10 dezenas para que se posa subtrair as dezenas. Então 108-27=81