直接写出得数．
2306+400= 101﹣52=
×
=（ 0.25）2=
7.4﹣4=
×30%= 6÷17= 0.3+5=
1÷
= 41.64÷6.9≈ 0.24÷0.8=
+
÷2=．
直接写得数
1﹣
=
﹣
= 16×
= 0.25×
÷0.125=
﹣
= 9.99+99= 0.1×0.1=
×
÷×=
口算
5.4﹣
= 3.14×8= 5.3+0.07= 8﹣
=
4×125= 2.137÷21.37=
×
= 1÷0.25=
直接写得数．
180×40= 1﹣0.625= 0.5÷0.02= 0.12=
+
=
×12= 1÷5%= 4π≈
口算
134﹣18= 1.01﹣0.98=
×
= 1.5×4=
7.45+8.55=
+
×8= 2÷0.25+1.1=
×6÷×6=
5.76﹣（2.76+0.8）= 108×
﹣10= 0.125×17×8= 0.43=
