．相关试题
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= 
= 
= 
=
+
= 2﹣
= 1﹣
+
= 
× =1．口算
5×0.9= 0.42÷7= 0.4÷8= 3.9×0=
86÷0.1= 30×0.05= 20+12.3= 54÷0.9=
6.3÷0.7= 9.54+0.46= 10﹣0.1= 1.5﹣0.01=
0.8×6= 3.8×0.5= 45÷0.45= 1.3+0.7=
+
= 
+
= 1﹣
= 
﹣
=
口算
5×0.9= 0.42÷7= 0.4÷8= 3.9×0=
86÷0.1= 30×0.05= 20+12.3= 54÷0.9=
6.3÷0.7= 9.54+0.46= 10﹣0.1= 1.5﹣0.01=
0.8×6= 3.8×0.5= 45÷0.45= 1.3+0.7=+= += 1﹣= ﹣=
﹣
=
+
）= 1﹣
÷
+99
+999
+
×3= 
﹣
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