Răspuns :
7 x 8 = 56 ( baloane rosii )
10 x 4 = 40 ( baloane albastre )
56 - 13 = 43 ( baloane rosii ramase )
40 - 9 = 31 ( baloane albastre ramase )
43 + 31= 74 ( baloane nevandute )
10 x 4 = 40 ( baloane albastre )
56 - 13 = 43 ( baloane rosii ramase )
40 - 9 = 31 ( baloane albastre ramase )
43 + 31= 74 ( baloane nevandute )