数学门诊．（对的打“√”，错的打“×”，并改正）
计算下列各题，能简算的要简算，并把主要的计算过程写出来．+﹣= ﹣﹣= ++=25×0.25×3.2= 6﹣（﹣）= ﹣++=
直接写得数．+= += ﹣= 1﹣= ﹣=0.25+= += 2+= += ﹣=
脱式计算，能简算的要简算．3﹣﹣++﹣+﹣．
①+= ②+= ③﹣=④2﹣= ⑤+= ⑥+=
下面各题怎样算简便就怎样算．6﹣﹣．
+
﹣
= 
﹣
﹣
= 
+
+
=
﹣
）= 
+
+
=
+
+
= 
﹣
= 1﹣
= 
﹣
=
= 
+
= 2+
= 
+
= 
﹣
=
﹣
+
+
﹣
+
﹣
．
+
+
= ③
﹣
=
= ⑤
+
= ⑥
+
=
﹣
．
粤公网安备 44130202000953号