脱式计算．3+2﹣3×+×÷（×+÷）÷7+×．
计算： ①56× ②× ③12÷ ④÷．
直接写出得数．×= 2.4÷= 7﹣﹣= 0.24×50%=÷7=×37.5%= 1÷÷1=÷=×= 1÷=×9+=÷=
直接写得数．×= 1﹣= 7+6.2=÷1=÷=×= 2.5×=×=
直接写出答案========
×=÷6=
+2
﹣3
×
+
÷（
×
+
÷
）
÷7+
×
．
②
×
③12÷
④
÷
．
×
= 2.4÷
= 7﹣
﹣
= 0.24×50%=
÷7=
×37.5%= 1÷
÷1=
÷
=
×
= 1
÷
=
×9+
÷
=
×
= 1﹣
= 7+6.2=
÷1=
÷
=
×
= 2.5×
=
×
=
=
=
=
=
=
=
=
=
×
=
÷6=
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