67+198= 200×0.24= 51.6÷6= 100﹣27.69=×= ÷= += 5﹣=0÷÷= 1÷×= 9×÷9×= 40%﹣=
计算：6666×6666= ．
0.75×2.5+0.085×75﹣7.5×0.1= ．
4.625+6.25+3+= ．
计算：+45.6×+53.4×= ．
在横线内填上合适的数，使各题能用简便方法计算． 10﹣﹣ （+）× ．
×
= 
÷
= 
+
= 5﹣
=
÷
= 1÷
×
= 9×
÷9×
= 40%﹣
=
+
= ．
+45.6×
﹣ 
+
）× ．
粤公网安备 44130202000953号