直接写出得数．12+48= 2.4×5= 78﹣0.8= 6.3÷0.1=﹣= += 8﹣= ÷6=0÷= 10.1﹣1= ×15= 2.3×4=+= 6÷= ﹣=
口算．﹣=+= 2﹣=+=﹣=﹣=++= 1﹣﹣=﹣+= 5﹣﹣=
直接写得数. 7.2÷9=﹣=+=﹣+= 5﹣=﹣×0=
= ．
直接写得数．========
﹣．
﹣
= 
+
= 8﹣
= 
÷6=
= 10.1﹣1= 
×15= 2.3×4=
+
= 6÷
= 
﹣
=
﹣
=
+
= 2﹣
=
+
=
﹣
=
﹣
=
+
+
= 1﹣
=
﹣
+
﹣
=
﹣
=
+
=
﹣
+
= 5﹣
=
﹣
= ．
=
=
=
=
=
=
=
=
﹣
．
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