Răspuns:
Explicație pas cu pas:
8.
7 copii..................15 inghetate .....................20 minute
1 copil...................15 inghetate.......................20 x 7 = 140 minute
1 copil ...................1 inghetata .........................140 : 15 = 9,(3) minute
9,(3) minute = 9 minute si 20 secunde
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9.
1/6 minute........................3 sarituri
1 minut ..............................3 x 6 = 18 sarituri
2 minute ...........................2 x 18 = 36 sarituri
o jumatate de minut .................18 : 2 = 9 sarituri
2 minute si jumatate ..................36 + 9 = 45 sarituri
