直接写出得数．45×= ×= += ××=×12= ×= ﹣= 0×+=
直接写出得数：×= ；×9= ； 6×= ； 0÷= ； 12×= ；×0= ；×= ；÷6= ．
===== 0.8= 1÷= 1﹣﹣=×12=÷=（3+）×0=+=
直接写得数：×=÷=÷3=+=×9×=1﹣÷= 1﹣= 1000×10%×100%=
直接写出得数÷3= 20×=÷4= 1﹣﹣=÷=÷=×=﹣=
直接写得数：×=÷3= 10÷=÷=÷=÷= 1÷=×= 7+=
= 
×
= 
+
= 
×
×
=
×12= 
×
= 
﹣
= 0×
+
=
×
= ；
×9= ； 6×
= ； 0÷
= ；
= ；
×0= ；
×
= ；
÷6= ．
=
=
=
=
= 0.8
= 1÷
= 1﹣
﹣
=
×12=
÷
=（3
+
）×0=
+
=
×
=
÷
=
÷3=
+
=
=1﹣
÷
= 1000×10%×100%=
÷3= 20×
=
÷4= 1﹣
﹣
=
÷
=
÷
=
×
=
﹣
=
×
=
=
÷
=
÷
=
÷
= 1÷
=
×
= 7+
=
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