1) 1.29 : 4.3 + 18 : 0.15 + 9 : 45 - 1.4 : 0.35 =  0.3 + 120 + 0.2 -  4 = 116.5

2) ( 48.72 : 1.2 + 1.696 : 0.32) * 1.2 - 3.4 = (  40.6 + 5.3) * 1.2 - 3.4 = 45.9 * 1.2 - 3.4 = 55.08 - 3.4 = 51.68

3) 24 - ( 1.0098: 0.054 + 2.47) = 24 -( 18.7 +2.47) = 24 - 21.17 = 2.83

4) ( 1.43 + 2.145) : 0.65 - ( 2 * 1.45 - 2.7) * 3.68 =  3.575 : 0.65 - ( 2.9 - 2.7) * 3.68 = 5.5 - 0.2 *3.68 = 5.5 - 0.736 =  4.764

5) 16.7 * ( 0.006 + 0.99) = 16.7 * 0.996 = 16.6332