下列各题怎样算简便就怎样算。47.5×84+47.5×16 3.5÷0.5+5.5+0.3 9.7﹣3.75﹣1.25+10.3
14.8×6.3-6.3×6.5+8.3×3.718.1+(3-0.299÷0.23)×1
5.09-(0.09+1.23) 9.36-(4.36-3.5)
7.5-2.45+7.5+2.45(-)×21+
2.5×(1.92÷0.3-5.9) 24.5-(7.58+)
45.55-(6.82+15.55) 34.52-17.87-12.23