Aflam cati elevi participa la concursul de romana :
960 : 15 = 64
Aflam cati elevi participa la concursul de mate :
3/28 × (960 - 64) =
= 3/28 × 896 =
= 3 × 32 =
= 96
Aflam cati elevi participa la altfel de concursuri(artistice,sportive) :
960 - (64 + 96) =
= 960 - 160 =
= 800