1) 16 + 33 + 14 + 37 = (16 + 14) + (33 + 37) = 30 + 70 = 100
2) 25 * 14 * 4 * 5 = (25 * 4) * (14 * 5) = 100 * 70 = 7000
3) 3/5 + 3 3/4 + 1 2/5 + 1 1/4 = (3/5 + 1 2/5) + (3 3/4 + 1 1/4) = 2 + 5 = 7
4) 3,2 * 5/6 * 5 * 6 = (3,2 * 5) * (5/6 * 6) = 16 * 5 = 80
5) 4,7 - 2,13 + 5,3 - 2,87 = (4,7 + 5,3) + (- 2,13 - 2,87) = 10 - 5 = 5
6) 2 1/4 * 1 1/7 * 4 * 7 = (2 1/4 * 4) * (1 1/7 * 7) = (9/4 * 4) * (8/7 * 7) = 9 * 8 = 72
7) 3,81 * 4,3 + 6,19 * 4,3 = 4,3 * (3,81 + 6,19) = 4,3 * 10 = 43
8) (4 - 3/10 - 1/5) * 10 = (4 - 3/10 - 2/10) * 10 = 40 - 3 - 2 = 35