4除1.8的商，加上3，再乘2，积是多少？
直接写得数．×=×3= 0÷=÷=×=×39=×=÷=÷=÷3=
直接写数对又快！==========
直接写出得数 10﹣0.1=+= 1÷= 14﹣﹣=×=﹣=×=（+）×72=
直接写出得数．×= 1÷0.9=÷0.8=×9÷×9= 5.6÷=×= 0÷=×=
直接写得数．×=÷14= 26×=÷28= 12×=×=×=×24=÷=÷=
×
=
×3= 0÷
=
÷
=
×
=
×39=
×
=
÷
=
÷
=
÷3=
=
=
=
=
=
=
=
=
=
=
+
= 1÷
= 14﹣
﹣
=
×
=
﹣
=
×
=（
+
）×72=
×
= 1÷0.9=
÷0.8=
×9÷
=
×
= 0÷
=
×
=
×
=
÷14= 26×
=
÷28= 12×
=
×
=
×
=
×24=
÷
=
÷
=
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