Sasha had 8 balloons and 4 blue. One sphere burst how many spheres remained?

75
1) 8+4=12 (x) - at Sasha only. 2) 12-1 = (x) - at Sasha remained 11. Answer: 11sharov1) all spheres at Sasha - remained 2)12-1=11 spheres at Sasha Answer: 11
171
Answer add