1) 3 * (27 + 99 : 3) = 3 * (27 + 33) = 3 * 60 = 180
2) 4 * (25 + 19 * 5) = 4 * (25 + 95) = 4 * 120 = 480
3) 2 * (96 - 36 : 3) = 2 * (96 - 12) = 2 * 84 = 168
4) 27 356 - 160 * 3 = 27 356 - 480 = 26 876
5) 41 008 - 240 * 4 = 41 008 - 960 = 40 048
6) 70 005 - 320 * 2 = 70 005 - 640 = 69 365
7) 6 450 : 6 = 1 075
8) 6 036 : 4 = 1 509
9) 4 956 : 7 = 708
10) 4 107 * 9 = 36 963
11) 1 248 * 6 = 7 488
12) 3 004 * 8 = 24 032