脱式计算．①（﹣）×（1﹣） ②×+÷③[1﹣（+）]×÷2 ④（+3.9++16.1）÷．
直接写得数．÷13= ×9= ÷=﹣×0= += 6÷=﹣= ×= ×=0÷= +16= ÷=
直接写出得数．50%+6= ×= 4÷0.5= 28×25%=95%+5= += 6.9÷23= 100×0.4=
直接写出得数= = = = +== = 1÷= = =
直接写出得数．×16= 10÷= 12÷=×= ×= ÷3=×= ×=
6×= += ×= 3﹣= ÷=1÷= ÷= ﹣= ×14= ÷12=
﹣
）×（1﹣
） ②
×
+
÷
+
）]×
÷2 ④（
+3.9+
+16.1）÷
．
÷13= 
×9= 
÷
=
﹣
+
=
﹣
= 
×
= 
×
=
= 
+16= 
÷
=
×
= 4÷0.5= 28×25%=
+
= 6.9÷23= 100×0.4=
= 
= 
= 
= 
+
=
= 
= 1÷
= 
= 
=
×16= 10÷
= 12÷
=
×
= 
×
= 
÷3=
×
= 
×
=
= 
+
= 
×
= 3﹣
= 
÷
=
= 
÷
= 
﹣
= 
×14= 
÷12=
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