笔算下面各题． 376×7= 328+436= 607×8= 880﹣407= 52÷6= 250×8=
计算（能简算的要简算）．（15+）× ﹣× 13×+×1587× ××32 +×．
怎样简便就怎样算×72﹣×23 ×25×40×．
能简算的要简算（+）÷÷+×842000÷125÷8 ×[﹣（+）]．
口算：= = = == = = =
计算下列题 ．
）×
﹣
×
+
×15
×
×32 
+
×
．
×72﹣
×25×40×
．
+
）÷
÷
+
×8
×[
﹣（
+
）]．
= 
= 
= 
=
= 
= 
= 
=
．
粤公网安备 44130202000953号