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va roggg!!!!!!!!!!!!

Va Roggg class=

Răspuns :

a) 3*20:81=3*20:3*4=3*20-4=3*16

c)2*348.32=2*348:2*5=2*343

e)49x7*253:7=7*2x7*253:7=7*2x7*252=7*254