用竖式计算．634÷31 409÷17 180÷21582÷29 801÷22 751÷25．
=== 1= 1.2×= 1= 6== 3= 0.9﹣= 0.75+= 24×=
直接写出得数 3×=÷= 18÷=××0=+=×=÷10= 1÷﹣÷1=
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=
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=
=
= 1
= 1.2×
= 1
=
=
= 3
= 0.9﹣
= 0.75+
= 24×
=
=
÷
= 18÷
=
×
×0=
+
=
×
=
÷10= 1÷
﹣
×
=
×3= 0÷
=
÷
=
×
=
×39=
×
=
÷
=
÷
=
÷3=
=
=
=
=
=
=
=
=
=
=
+
= 1÷
= 14﹣
﹣
=
×
=
﹣
=
×
=（
+
）×72=