口算
400÷8= 120×70= 450×50= 172﹣48=
20×26= 9×500= 940×20= 560+400=
54×30= 800×16=
2.5+3.7= 217÷7= 70﹣34=
1.2×0.5= 1.3+27= 1.5÷0.5=
4.5﹣0.5=25×0.4=
=
=
=
=
=
=
=
=
直接写出得数：
103.5﹣83=
÷2= 1﹣40%=
﹣
= 0÷
= 1﹣25%﹣70%=
直接写得数
2.2+3.57= 11.3﹣8.6= 3.25×4= 14÷35=
÷6=
﹣
=
×
=
÷
=
+
=
﹣
=
直接写出得数．
25+7.5= 200×3.6= 217﹣18=
+
×5=
42÷0.02= 3﹣
=÷
=（
+
）×56=
直接写出得数．
0.78+0.22=
=
= 0÷
=
3+5%+17%=
= 0.43+0.17+0.39= 8.4+
=
0.1÷0.01= 1.2×
= 32×2.5=
=
742﹣299= 101×9.2﹣9.2=
=
=