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Calculati ,apoi completati tabelul :

                    a ......... b..............c......( a+b ) : c .......( a: c ) + (b : c )

                     _________________________________________
                    488 .......408...........4.........?...............................?
                       ________________________________________
                      309 ....... 633.........   3............?.........................?


Răspuns :

(488+408)/4=896/4=224
(309+633)/3=942/3=314

(488/4)+(408/4)=122+102=224
(309/3)+(633/3)=103+211=314
sunt la fel deorece (a+b)/c=(a/c)+(b/c)
(a+b):c=(488+408):4=214
(a:c)+(b:c)=(488:4)+(408:4)=214
(a+b):c=(309+633):3=314
(a:c)+(b:c)=314