S-a se calculeze :
5) 65 grade 24´´ -16 grade 34´50´´=
6)35 grade - 34 grade 28´´=
7)90 grade - 44 grade 15´´=
8)26 grade 11´ 12´´ - 11 grade 30´ 24´´=
9) 6 grade 41´ 38´´ x 4=
10) 13 grade 41´29´´ x 3 =
11)35 grade :2 =
12) 25 grade 12´: 2 =
Va rog
P.S ( ce le doua ´´ inseamna secunde si asta ´ inseamna minute si x inseamna inmultire).