Răspuns:
Explicație pas cu pas:
1) Cate stelute albastre a confectionat Maria ?
17 - 12 = 5 stelute albastre
2) Cate stelute verzi a cofectionat Maria ?
5 x 3 = 15 stelute verzi
3) Cate stelute a confectionat Maria in total ?
17 + 5 + 15 = 37 stelute
Raspuns : Maria a confectionat 37 stelute.