脱式计算：（第（4）题要巧解）
[（8
﹣4.625）÷（2.4+1
）]×50% （0.9+1
）÷[（4
﹣3
）×0.8
81×[（4
+0.005×700）÷1
] （1﹣12.5%×8）÷（1
+
）+
．
脱式计算：（第（4）题要巧解）
[（8﹣4.625）÷（2.4+1）]×50% （0.9+1）÷[（4﹣3）×0.8
81×[（4+0.005×700）÷1] （1﹣12.5%×8）÷（1+）+．
=
=
=
=
=
=
=
=
=
= 1﹣
=
+0.625=
=
= 3﹣
=
+0.75=
+
﹣
= 1.8÷2.7=
﹣
=
+
= 4+
= 3﹣
=
﹣
=
﹣
=
﹣
﹣
=
+
+
=
+
= 
﹣
= ．
=
=
=
=
=
=
=
=
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