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怎样简便就怎样算:23+(45-23)×53,34÷16+0.75×8, 11-78-2.125, 12×(14+16-13).

编辑:chaxungu时间:2026-04-27 13:18:25分类:小学数学题库

怎样简便就怎样算:
2
3
+(
4
5
-
2
3
)×
5
3
;
3
4
÷
1
6
+0.75×8;
11-
7
8
-2.125;
12×(
1
4
+
1
6
-
1
3
).算:
2
3
+(
4
5
-
2
3
)×
5
3

=
2
3
+
4
5
×
5
3
-
2
3
×
5
3

=
2
3
+
4
3
-
10
9

=2-
10
9

=
8
9
;

3
4
÷
1
6
+0.75×8
=
3
4
×6+
3
4
×8
=
3
4
×(6+8)
=
3
4
×14
=
21
2
;

11-
7
8
-2.125
=11-0.875-2.125
=11-(0.875+1.125)
=11-2
=9;

12×(
1
4
+
1
6
-
1
3
)
=12×
1
4
+12×
1
6
-12×
1
3

=3+2-4
=1.