60×7= 40×3= 120×4= 40×6=80×3= 150×3= 50×3= 90×3=210×4=
列式计算．从里面减去与的和．差是多少？
直接写出得数．1﹣=+=﹣=+=+=
计算下面各题，能用简便方法的要用简便方法计算.++ ++ 1﹣+ ﹣﹣．
看谁算的又对又快．+= += ﹣= 2﹣= += +=
直接写得数．+= ﹣= 1﹣= ﹣0.25= 6+=+= += ﹣= 1﹣﹣= ++=．
里面减去
与
的和．差是多少？
=
+
=
﹣
=
+
=
+
=
+
+
+
+
1﹣
+
﹣
﹣
．
+
+
= 
﹣
= 2﹣
= 
+
= 
+
=
+
= 
﹣
= 1﹣
= 
﹣0.25= 6+
+
= 
+
= 
﹣
= 1﹣
﹣
= 
+
+
=．
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