1) 6400×0.0145-(1272.6:0.42-3000)=
98.8-(3030-3000) = 98.8-30 = 68.8
2) (0.7:1.4-0.02):0.012+1.6×(0.548-0.023)=
(0.5-0.02):0.012+1.6×0.525 = 0.48:0.012+0.84 = 40+0.84 = 40.84
3) (1.184:3.2+0.832:0.4):0.5+1.5=
(0.37+2.08):0.5+1.5 = 2.45:0.5+1.5 = 4.9+1.5 =
6.4
4) 4.96:10-35.8:100-0.0042=
0.496-0.358-0.0042 = 0.138-0.0042 = 0.1338
5) (0.04+3.59)×(7.35+2.65):300=
3.63×10:300 = 36.3:300 = 0.121