口算下面各题．
+
= 
﹣
= 
+
= 
﹣
= 6.4+2.3= 7.3﹣0.4=
1.1+2.8= 707÷7= 360÷3= 93÷3= 40×25= 720÷4=
80﹣25= 36×0=
口算下面各题．+= ﹣= += ﹣= 6.4+2.3= 7.3﹣0.4=
1.1+2.8= 707÷7= 360÷3= 93÷3= 40×25= 720÷4=
80﹣25= 36×0=
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