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Scrie scăderile repetate ca operaţii de împărţire
20-10-10=0 b) 24-8-8-8=0
16-8-8=0 27-9-9-9=0

c)45-9-9-9-9-9=0
30-6-6-6-6-6=0


Răspuns :

20-10-10=0; 20÷2=10
16-8-8 =0 ;16÷2=8
27-9-9-9=0;27÷3=9
45-9-9-9-9-9=0 ;45÷5=9
30-6-6-6-6-6=0;30÷5=6
20/2 ,24/3,16/2,27/3,45/5,30/5