4×300= 285+725= 240÷4= 80﹣400÷80=
1000﹣548= 25×4= 15×6﹣6×5= ÷9=20…6．
直接写得数．
0.2×0.14﹦ 3.4+1.6﹦ 0.73﹣0.3﹦ 7.1+1.09= 3.5×20﹦
30÷0.6﹦ 20﹣19.3= 0.36÷1.2= 1.2×0.4+0.4×1.3= 4×0.5÷4×0.5=
口算下面各题．
0.12×0.6= 4.5+0.76= 2x﹣0.72= 2.1÷2=
3.6÷0.09= 7.5×0.4= 3.8a+1.02a= 9.6÷0.06=
3.57÷0.7= 3.2×0.5= 0.4×0.3×2.5= 4.8+6.3+5.2=
口算：
2 1×0.7= 16×3.2= 0.98×14=
23÷1000= 3.6÷0.36= 0.85+0.2+0.7=
2÷0.25= 12.5﹣7.5+2.5= 1﹣0.3×0.2=
直接写出得数．
3.5×0.2= 10÷0.5= 6×0.25= 0.63÷0.9= 1.8×0.4=
0.99÷0.01= 1.2×4= 3.9×0.01= 2.33×1.2= 1.25×0.8=
2.3×1.91= 0.57×0.12= 3.08×0.25=
8.32÷4= 8.94÷0.12= 14.52÷2.4=