1.5×4= 2.5×4 = 0.13× 4= 2.4-0.8=5.4÷10= 4.2×1000= 0.45÷0.15= 3.6÷0.1= O .75+0.8 = 8.5×100= 3.2÷100= 0.18×0.3= 8.5÷ 1.7= 1.2÷0.3 = 0.49÷0.7= O .04×25=0.096÷0.03= 84÷4.2= 1000×0.756=0.5...