列式计算．①7.2与3.8的和除以2，商是多少？②一个数加上它的50%等于7.5，求这个数．
直接写得数．×6= 30×= ÷= 20÷=+= ××0= ×= 1÷×=5.6÷0.08= 39××=
直接写得数．﹣= ÷= ×= ×= 10×= ×=÷= ÷= 15×= ÷= += ÷22=
直接写出得数．= = = = == = = = ．
直接写出得数．÷10= ×= 1÷= 8×=1+= ÷= ×÷= 1÷6×=
直接写得数．4×30%= ﹣= 44÷= 0.45÷5=10﹣0.57﹣0.43= ×÷×= ﹣×= 0.68++0.32=8.37×2.4÷1.9×0= 1÷5+=
×6= 30×
= 
÷
= 20÷
=
+
= 
×
×0= 
×
= 1÷
=
×
=
﹣
= 
÷
= 
×
= 
×
= 10×
= 
×
=
÷
= 
÷
= 15×
= 
÷
= 
+
= 
÷22=
= 
= 
= 
= 
=
= 
= 
= 
= 
．
÷10= 
×
= 1÷
= 8×
=
= 
÷
= 
×
÷
=
﹣
= 44÷
= 0.45÷5=
×
÷
= 
﹣
=
粤公网安备 44130202000953号