6+17= 156﹣156= 4500÷9= 41+18= 3600÷30=
57+43= 48÷12= 1.8+3.5= 7﹣3.8= 35×60=
35×10= 1500÷10= 0÷46.79= 1.5÷5= 8÷5=
+= 
+= 1﹣
= 
﹣
=
3﹣
= 
×2= 
×= 
÷
= 40×80=
80﹣17 32×20 75﹣69= 13×5= 8.7﹣2.4=
2000+400= 1.4×100= 1.2÷100= 124.6×1= 7.256÷7.256=
1.2÷0.2= 24×10%= 
+0.5= 2+
= +
=
÷2= 
÷
= 
×0.2=
脱式计算：
52.4﹣（15+0.6）÷1.69.87×99+9.8746.8÷0.9÷0.4 5.5×17.3+6.7×5.5．
口算．
1.8×0.5=49×0.2=10÷2.5=0.83÷0.1=2.4﹣0.8=
0.44÷2.2=0.6×0.5=0.4+0.15=1.25×8=0.56÷8=
12.5×18.5×0.8=5.38+0.45+1.55=0.42÷0.7÷0.6=0.74×0.6+0.74×0.4=
怎样算简便就怎样算．
4.32+5.43+6.6817.17﹣6.8﹣3.25.29×9+5.29
16.8×10.12.74×9.5+5×0.2740.36+9.6÷3.2．
怎样算简便就怎样算．
①2.43×99+2.43
②6.8+1.25×6.8×8
③（8.14﹣3.75）÷2.5÷4
④4.58+2.39+（5.42+7.61）
⑤6.3÷2.8
⑥26.7﹣0.5×0.5﹣0.75．
下面各题，你有简便的方法解决吗？
①3.75×25+6.25×25 ②25.46﹣8.23﹣1.76 ③2.9+7.1×10 ④1.25×32×0.25．