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65+13=78dag
b 78x12=936dag=9.36kg
b)0,78 razy 12=9,36kg <-----12 słoików z miodem
0,65kg = 0,13kg = 0,78kg - masa 1 słoika z miodem
0,78kg * 12 = 9,36kg - masa 12 stłoików z miodem