口算．
0.4×0.25= 3.2÷0.8= 1.25×7×0.8= 1÷8=
0.2×0.9+0.6×0.2= 6.2÷0.62= 2﹣2÷5= 1﹣0.08=
0.5×0.1÷0.5×0.1= 0.01÷0.001×0.1=
相关试题
直接写得数．
①3451÷17×（323﹣299）=
②22.9×7.34+2.29×26.6=
③
﹣（
﹣
）= 15
④48.48﹣
+
﹣36.45=
⑤〔1，9﹣1.9×（
﹣1.9）〕÷
= ．
﹣ 
+54× ．
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