直接写出得数．
3.2÷0.01=
×
=
÷
= 5.6+3.99=
10×
= 4×
×
=
÷
= 6.4×0.5=
口算．
0.9×0.4= 31.4+6= 0.64÷4=
﹣
=
÷
=
×
=
﹣
=
÷4=
+
+
= 1
﹣
﹣
=
3.14×8= 0.8×40%= 0.125×32=
﹣
=
4.5×102= 0.52﹣0.32= 10×10%= 7×
÷7×=
3.14×0.9+3.14×0.1= 52×20%= 30÷75%= 6÷（
﹣
）=
直接写出得数．
3.14×4=
×16= 1÷
=
÷
= 0÷（
+
）=
3.14×25=
×6=
÷
=
×
=（
+
）×8=
直接写出得数：
36+79= 15÷0.1= 9.1﹣1.9= 7.2÷0.6=
0.25×8=
÷
=
﹣
=
×
=
0.25×4×1.2=
+
= 0.52= 0.74×0.6+0.74×0.4=