97
． 
． 
× =0.3× = ×40=1． 
． 
= 
= 
= 
=
= 
= 
= 
=
= 
= 
×（
）
． 
是28，它的
是多少？ 
+
+0.375
+420÷
+
+
）÷
﹣
×
= 0.25×32= 742+268= 10﹣3.2﹣5.8= 
×
=
+﹣
= 1÷5×= 12×（+）= 1.01﹣91%= 
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