把下面的算式补充完整．
18.7﹣16.4+
=18.7+ ﹣l6.4
=20﹣16.4
=
35.67+ +21.35
=35.67+（ +21.35）
=35.67+50
=
54.37﹣ ﹣9.23
=54.37﹣（ +9.23）
=54.37﹣10
=
33.25+6.23﹣
=33.25﹣ +6.23
=30+6.23
= ．
把下面的算式补充完整．
18.7﹣16.4+
=18.7+ ﹣l6.4
=20﹣16.4
=
35.67+ +21.35
=35.67+（ +21.35）
=35.67+50
=
54.37﹣ ﹣9.23
=54.37﹣（ +9.23）
=54.37﹣10
=
33.25+6.23﹣
=33.25﹣ +6.23
=30+6.23
= ．
=
=
=
=
=
=
=
=
+
×
×
﹣
×
×
×
×
．
+
+
60.62﹣（9.2+12.62） 6.8+
+3.2+
﹣
﹣
+
+
﹣
﹣（
﹣
）
﹣
）×5×72007×
×[4÷（
﹣
）]（
+
）×7﹣21÷13
÷8+
×
．
+
）×20
÷
×
101×
﹣
×48
÷
+
．
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