题目内容
把算式写完整.
327+915
=327+
=
=
=
705-398
=705-
=
=
327+915
=327+
900
900
+10
10
+5
5
=
1227
1227
+10
10
+5
5
=
1237
1237
+5
5
=
1242
1242
705-398
=705-
400
400
+2
2
=
305
305
+2
2
=
307
307
.分析:根据整数加减法的运算性质进行解答即可.
解答:解:327+915
=327+900+10+5
=1227+10+5
=1237+5
=1242
705-398
=705-400+2
=305+2
=307.
故答案为:900+,10,5,1227+,10,5,1237,5,1242,400,2,305,2,307.
=327+900+10+5
=1227+10+5
=1237+5
=1242
705-398
=705-400+2
=305+2
=307.
故答案为:900+,10,5,1227+,10,5,1237,5,1242,400,2,305,2,307.
点评:本题主要考查了学生对运算定律的掌握情况.
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