4.7+0.83 10﹣4.79.41﹣2.6+3.09 9.41+3.09﹣2.614.62÷0.83 14.62﹣0.835.25×0.75 5.25+0.754.48×0.46 4.48×0.406a÷1.02 a÷0.12(a≠0)b÷0.2 b×5(b≠0)x÷0.94 x÷0.84(x≠0)