把103减去87的差扩大l3倍，所得的积比500少多少？
下面各题怎样算简便就怎样算． 6﹣﹣．
直接写得数．﹣=﹣=+=+=+=﹣=﹣= 0.3+=
脱式计算，能简算的要简算+++﹣﹣．
直接写出得数+=﹣+= 3﹣=m﹣m=
直接写出得数．====
﹣
．
﹣
=
﹣
=
+
=
+
=
+
=
﹣
=
﹣
= 0.3+
+
+
+
﹣
﹣
．
+
=
﹣
+
= 3﹣
=
m﹣
m=
=
=
=
=
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