口算
35+17= 11﹣0.6= 
+
= 
﹣
=
58﹣39= 32.8÷4= 
﹣
= 
=
4.6+3.2= 2.5×40= 
×
= 
+
=
0.43×3= 0÷5.8= 9
= 
÷1=
口算
35+17= 11﹣0.6= += ﹣=
58﹣39= 32.8÷4= ﹣= =
4.6+3.2= 2.5×40= ×= +=
0.43×3= 0÷5.8= 9= ÷1=
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