计算，能简算的要简算．
64×7.65.68×7.5184.6÷2.8
0.8×（1.25+50）47.6÷4÷2.536.45÷（0.82+3.4×0.2）
4.3×68+43×3.26.75÷[0.9÷（0.3×0.4）]3.72×0.1+3.72×8.9．
脱式计算．
17.5÷12.5×1.41.58×99+1.584.38÷0.125÷86.4×4.5+3.6×4.5．
计算各题，能简算的要简算．
3.4×12.5×0.085.4×2.8+7.2×5.48.8÷0.4÷2 8.7×9.9．
计算，能简算的要简算．
1.08×0.8÷0.93.4×5.3+6.6×5.30.25×12.5×0.8×4
7.28+3.2÷2.51.8×10244.28÷0.9÷4.1．
怎样算简便就怎样算．
4.3+5.4﹣6.815.17﹣6.8﹣3.2
12.75﹣（2.75+6.8）1.27+3.9+0.73+16.1．